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niumooniumoo
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feat: add java-base
1 parent 2ca1c77 commit a8263f9

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‎core-java-modules/core-java-base/.gitignore‎

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target/
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!.mvn/wrapper/maven-wrapper.jar
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!**/src/main/**/target/
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!**/src/test/**/target/
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### IntelliJ IDEA ###
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.idea/modules.xml
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.idea/jarRepositories.xml
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.idea/compiler.xml
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.idea/libraries/
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*.iws
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*.iml
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*.ipr
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### Eclipse ###
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.apt_generated
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.classpath
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.factorypath
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.project
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.settings
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.springBeans
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.sts4-cache
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### NetBeans ###
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/nbproject/private/
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/nbbuild/
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/dist/
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/nbdist/
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/.nb-gradle/
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build/
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!**/src/main/**/build/
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!**/src/test/**/build/
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### VS Code ###
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.vscode/
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### Mac OS ###
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.DS_Store

‎core-java-modules/core-java-base/pom.xml‎

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<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
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xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
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<parent>
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<artifactId>core-java-modules</artifactId>
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<groupId>com.wdbyte.core-java-modules</groupId>
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<version>1.0.0-SNAPSHOT</version>
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</parent>
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<modelVersion>4.0.0</modelVersion>
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<artifactId>core-java-base</artifactId>
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<name>Archetype - core-java-base</name>
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<url>http://maven.apache.org</url>
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</project>

‎core-java-modules/core-java-base/src/main/java/com/wdbyte/JavaArray.java‎

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package com.wdbyte;
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import java.util.ArrayList;
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import java.util.Arrays;
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import java.util.List;
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/**
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* @author niulang
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* @date 2023/03/23
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*/
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public class JavaArray {
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public static void main(String[] args) {
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// 数组定义
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String[] aaa = new String[11];
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System.out.println(aaa.length);
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// 数组访问
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int[] arr = {1, 2, 3};
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System.out.println(arr.toString()); // 数组地址
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arr[0] = 10;
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System.out.println(arr[0]);
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for (int a : arr) {
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System.out.println(a);
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}
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for (int i = 0; i < arr.length; i++) {
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System.out.println(arr[i]);
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}
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// copy
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String[] strArr = {"hello", "world", "!"};
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String[] strArrByClone = strArr.clone();
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System.out.println(String.join(" ", strArrByClone));
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// 输出：hello world !
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String[] strAyyByCopy = new String[5];
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System.arraycopy(strArr,1,strAyyByCopy,3,2);
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for (String s : strAyyByCopy) {
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System.out.println(s);
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}
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String[] newArr = Arrays.copyOfRange(strArr, 0, 2);
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System.out.println(Arrays.toString(newArr));
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// 输出：null
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//null
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//null
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//world
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//!
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Person[][] personArr = new Person[2][2];
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personArr[0][0] = new Person("www");
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personArr[1][1] = new Person("wdbyte.com");
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Person[][] personArrByClone = personArr.clone();
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personArrByClone[0][0] = new Person("https://www");
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System.out.println(personArr[0][0].name);
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System.out.println(personArrByClone[0][0].name);
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int[] numArr = {1, 3, 5, 7, 9, 2, 4, 6, 8, 10};
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// 对数组进行排序
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Arrays.sort(numArr);
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// 将数组转换成字符串输出
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System.out.println(Arrays.toString(numArr));
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// 将数组转换成 List
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String[] strArray = new String[3];
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// 将数组的所有元素都赋为指定的值
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Arrays.fill(strArray,"byte");
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System.out.println(Arrays.toString(strArray));
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List<String> stringList = Arrays.asList("a","b","c");
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System.out.println(stringList);
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}
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static class Person{
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public String name;
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public Person(String name) {
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this.name = name;
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}
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}
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}

‎core-java-modules/core-java-base/src/main/java/com/wdbyte/JavaArray3.java‎

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package com.wdbyte;
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/**
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* @author niulang
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* @date 2023/03/25
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*/
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public class JavaArray3 {
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public static void main(String[] args) {
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int[][] myArray1 = {{1, 2, 3}, {4, 5, 6}, {7, 8, 9}};
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int[][] myArray2 = {{1, 2, 3}, {4, 5, 6}, {7, 8, 9}};
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int[][] myArray3 = {{1, 2, 3}, {4, 5, 6}, {7, 8, 9}};
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int[][][] array3d = {myArray1, myArray2, myArray3};
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for (int i = 0; i < array3d.length; i++) {
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for (int j = 0; j < array3d[i].length; j++) {
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for (int k = 0; k < array3d[i][j].length; k++) {
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System.out.print(array3d[i][j][k] + " ");
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}
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System.out.println();
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}
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System.out.println("-----");
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}
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System.out.println(array3d[1][1][1]);
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}
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}

‎core-java-modules/core-java-base/src/main/java/com/wdbyte/JavaDataType.java‎

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package com.wdbyte;
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/**
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* @author niulang
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* @date 2023/03/23
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*/
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public class JavaDataType {
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public static void main(String[] args) {
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boolean result = true;
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char capitalC = 'C';
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byte b = 100;
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short s = 10000;
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int i = 100000;
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// 10 进制的 26
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int decVal = 26;
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// 16 进制的 26
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int hexVal = 0x1a;
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// 2 进制的 26
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int binVal = 0b11010;
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System.out.println(decVal);
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System.out.println(hexVal);
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System.out.println(binVal);
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long creditCardNumber = 1234_5678_9012_3456L;
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long socialSecurityNumber = 999_99_9999L;
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float pi = 3.14_15F;
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long hexBytes = 0xFF_EC_DE_5E;
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long hexWords = 0xCAFE_BABE;
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long maxLong = 0x7fff_ffff_ffff_ffffL;
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byte nybbles = 0b0010_0101;
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long bytes = 0b11010010_01101001_10010100_10010010;
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}
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}

‎core-java-modules/core-java-base/src/main/java/com/wdbyte/JavaString.java‎

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package com.wdbyte;
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/**
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* @author niulang
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* @date 2023/03/22
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*/
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public class JavaString {
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public static void main(String[] args) {
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//String str1 = "Hello world";
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//String str2 = "Hello world";
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//String str3 = new String("Hello world");
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//String str4 = new String("Hello world");
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//
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//System.out.println(str1 == str2);
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//System.out.println(str3 == str4);
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//System.out.println(str1 == str4);
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// 比较
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//String str1 = "abc";
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//String str2 = "abz";
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//System.out.println(str1.compareTo(str2));
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//System.out.println(str2.compareTo(str1));
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//// 输出：-23
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//// 输出：23
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//System.out.println("19999".compareTo("2"));
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//// 输出：-1
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//
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//// CharSequence
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//String str = "Hello, world!";
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//str.chars().forEach(System.out::println);
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//str.chars().mapToObj(c -> (char) c).forEach(System.out::print);
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//String str1 = "Hello";
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//String str2 = "world";
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//String str3 = str1 + str2;
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//String str4 = str1 + str2;
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//String str5 = "Hello" + "world";
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//String str6 = "Hello" + "world";
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//System.out.println(str3 == str4);
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//System.out.println(str5 == str6);
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//String str1 = new StringBuilder("计算机").append("软件").toString();
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//System.out.println(str1.intern() == str1);
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//String str2 = new StringBuilder("ja").append("va").toString();
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//System.out.println(str2.intern() == str2);
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//
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//String b = "12";
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//String d = new StringBuilder("计算机").append("软件").toString();
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//String c = new StringBuilder("计算机").append("软件").toString();
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//String a = "计算机软件";
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//System.out.println(a == d);
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//System.out.println(a == c);
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String str0 = "abc";
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String str1 = new String("abc");
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String str3 = "abc";
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System.out.println(str1 == str0);
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System.out.println(str3 == str0);
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str1.intern();
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String str2 = new String("Hello,world");
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System.out.println(str1 == str2);
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}
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public void test() {
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String str1 = "Hello, world!";
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String str2 = "Hello, world!";
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System.out.println(str1 == str2);
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}
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}

‎core-java-modules/core-java-base/src/main/java/com/wdbyte/JavaStringBuilder.java‎

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package com.wdbyte;
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/**
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* @author niulang
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* @date 2023/03/30
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*/
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public class JavaStringBuilder {
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public static void main(String[] args) {
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StringBuilder sb1 = new StringBuilder();
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System.out.println(sb1.capacity()); // 容量：16
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StringBuilder sb2 = new StringBuilder("wdbyte.com");
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System.out.println(sb2.capacity()); // 容量：26
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StringBuilder sb3 = new StringBuilder("www");
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sb3.append(".wdbyte.com");
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System.out.println(sb3.toString()); //
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StringBuilder sb4 = new StringBuilder("wdbyte");
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sb4.insert(0,"www.");
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System.out.println(sb4.toString()); // www.wdbyte
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sb4.insert(10,".com");
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System.out.println(sb4.toString()); // www.wdbyte.com
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StringBuilder sb5 = new StringBuilder("www.wdbyte.com");
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sb5.delete(0,4);
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System.out.println(sb5); // wdbyte.com
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StringBuilder sb6 = new StringBuilder("hello world!");
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sb6.replace(6,11, "java"); // 结果为 "hello java!"
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System.out.println(sb6);
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StringBuilder sb7 = new StringBuilder("hello world!");
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sb7.reverse();
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System.out.println(sb7);
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}
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}

‎core-java-modules/core-java-collect/pom.xml‎

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<?xml version="1.0" encoding="UTF-8"?>
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<project xmlns="http://maven.apache.org/POM/4.0.0"
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xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
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xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
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<parent>
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<artifactId>core-java-modules</artifactId>
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<groupId>com.wdbyte.core-java-modules</groupId>
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<version>1.0.0-SNAPSHOT</version>
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</parent>
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<modelVersion>4.0.0</modelVersion>
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<artifactId>core-java-collect</artifactId>
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<properties>
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<maven.compiler.source>8</maven.compiler.source>
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<maven.compiler.target>8</maven.compiler.target>
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<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
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</properties>
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</project>

‎core-java-modules/pom.xml‎

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<module>core-java-io</module>
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<module>core-java-string</module>
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<module>core-java-18</module>
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<module>core-java-collect</module>
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<module>core-java-base</module>
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</modules>
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</project>

‎tool-java-hotcode/.gitignore‎

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target/
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!.mvn/wrapper/maven-wrapper.jar
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!**/src/main/**/target/
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!**/src/test/**/target/
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### IntelliJ IDEA ###
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.idea/modules.xml
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.idea/jarRepositories.xml
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.idea/compiler.xml
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.idea/libraries/
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*.iws
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*.iml
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*.ipr
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### Eclipse ###
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.apt_generated
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.classpath
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.factorypath
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.project
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.settings
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.springBeans
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.sts4-cache
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### NetBeans ###
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/nbproject/private/
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/nbbuild/
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/dist/
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/nbdist/
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/.nb-gradle/
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build/
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!**/src/main/**/build/
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!**/src/test/**/build/
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### VS Code ###
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.vscode/
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### Mac OS ###
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.DS_Store

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