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feat: Java 接口
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‎README.md‎

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- [Java 多维数组](https://www.wdbyte.com/java/java-array-mul/)
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- [Java StringBuilder](https://www.wdbyte.com/java/java-stringbuilder/)
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- [Java 继承](https://www.wdbyte.com/java/extends/)
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- [Java 接口](https://www.wdbyte.com/java/interface/)
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## 🌿 SpringBoot 2.x 教程
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‎core-java-modules/core-java-base/pom.xml‎

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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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<properties>
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<maven.compiler.source>17</maven.compiler.source>
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<maven.compiler.target>17</maven.compiler.target>
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</properties>
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</project>

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

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package com.wdbyte;
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package com.wdbyte.array;
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import java.util.ArrayList;
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import java.util.Arrays;

‎core-java-modules/core-java-base/src/main/java/com/wdbyte/array/JavaArray2.java‎

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package com.wdbyte.array;
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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 JavaArray2 {
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public static void main(String[] args) {
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int[][] myArray = {{1, 2, 3}, {4, 5, 6}, {7, 8, 9}};
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for (int i = 0; i < myArray.length; i++) {
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for (int j = 0; j < myArray[i].length; j++) {
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System.out.print(myArray[i][j] + " ");
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}
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System.out.println();
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}
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System.out.println(myArray[0][0]); // 输出1
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System.out.println(myArray[0][1]); // 输出2
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System.out.println(myArray[1][0]); // 输出4
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System.out.println("------------");
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int intArray[][] = { { 1, 2, 3 }, { 4, 5 } };
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int cloneArray[][] = intArray.clone();
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// 输出：false
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System.out.println(intArray == cloneArray);
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// 因为是浅拷贝，所以元素引用相同，输出 true
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System.out.println(intArray[0] == cloneArray[0]);
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System.out.println(intArray[1] == cloneArray[1]);
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}
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}

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

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package com.wdbyte;
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package com.wdbyte.array;
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/**
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* @author niulang

‎core-java-modules/core-java-base/src/main/java/com/wdbyte/array/JavaArray4.java‎

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package com.wdbyte.array;
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/**
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* 锯齿数组
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* @author niulang
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* @date 2023/03/25
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*/
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public class JavaArray4 {
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public static void main(String[] args) {
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int[][] arrName1 = new int[][] {
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new int[] {10, 20, 30, 40},
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new int[] {50, 60, 70, 80, 90, 100},
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new int[] {110, 120}
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};
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int[][] arrName2 = {
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new int[] {10, 20, 30, 40},
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new int[] {50, 60, 70, 80, 90, 100},
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new int[] {110, 120}
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};
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int[][] arrName3 = {
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{10, 20, 30, 40},
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{50, 60, 70, 80, 90, 100},
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{110, 120}
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};
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int[][] jaggedArray = new int[3][];
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jaggedArray[0] = new int[] {1, 2, 3};
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jaggedArray[1] = new int[] {4, 5};
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jaggedArray[2] = new int[] {6, 7, 8, 9};
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for (int i = 0; i < jaggedArray.length; i++) {
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for (int j = 0; j < jaggedArray[i].length; j++) {
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System.out.print(jaggedArray[i][j] + " ");
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}
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System.out.println();
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}
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}
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}

‎core-java-modules/core-java-base/src/main/java/com/wdbyte/oop/JavaExtends.java‎

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System.out.println("学习");
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}
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@Override
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public void eat() {
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System.out.println("吃大米");
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}
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@Override
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public void sleep() {
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System.out.println("上课时不能睡觉");

‎core-java-modules/core-java-base/src/main/java/com/wdbyte/oop/JavaInterface.java‎

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package com.wdbyte.oop;
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/**
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* @author niulang
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* @date 2023/04/13
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*/
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public class JavaInterface {
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public static void main(String[] args) {
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MyInterface.staticMethod();
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System.out.println(MyInterface.param);
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}
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}
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interface MyInterface {
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String param = null;
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void method1();
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void method2();
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// 默认方法
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default void defaultMethod() {
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System.out.println("default method");
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}
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// 私有方法
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private void privateMethod() {
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System.out.println("private method");
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}
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// 静态方法
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static void staticMethod() {
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System.out.println("static method");
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}
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// 私有静态方法
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private static void privateStaticMethod() {
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System.out.println("private static method");
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}
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}
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interface IMobilePhone{
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void mehtod1();
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}
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interface MyInterface2{
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void mehtod2();
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}
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class IPhone14 implements IMobilePhone{
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@Override
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public void mehtod1() {
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}
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}
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class Xiaomi14 implements IMobilePhone{
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@Override
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public void mehtod1() {
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}
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}

‎core-java-modules/core-java-base/src/main/java/com/wdbyte/oop/JavaInterface2.java‎

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package com.wdbyte.oop;
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/**
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* @author niulang
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* @date 2023/04/13
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*/
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public class JavaInterface2 {
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public static void main(String[] args) {
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//XPhone xPhone = new XPhone();
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//xPhone.powerUp();
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//xPhone.call();
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}
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}
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/**
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* 手机系统功能接口
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*/
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interface IMobilePhoneSystem{
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// 开机
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void powerUp();
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// 显示
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void display();
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// 声音
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void sound();
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}
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/**
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* 手机基本功能
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*/
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interface IMobilePhoneBasicFunction extends IMobilePhoneSystem {
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// 打电话
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void call();
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// 发短信
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void sendMessage();
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}
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class XPhone implements IMobilePhoneBasicFunction{
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@Override
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public void powerUp() {
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System.out.println("XPhone 开始开机");
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}
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@Override
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public void display() {
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System.out.println("XPhone 开始显示");
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}
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@Override
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public void sound() {
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System.out.println("XPhone 发出声音");
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}
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@Override
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public void call() {
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System.out.println("XPhone 开始拨打电话");
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}
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@Override
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public void sendMessage() {
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System.out.println("XPhone 开始发送短信");
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}
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}

‎core-java-modules/core-java-base/src/main/java/com/wdbyte/oop/JavaInterface3.java‎

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package com.wdbyte.oop;
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/**
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* @author niulang
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* @date 2023/04/14
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*/
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public class JavaInterface3 {
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public static void main(String[] args) {
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System.out.println(MyInterface.param);
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}
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interface MyInterface{
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String param = "https://www.wdbyte.com";
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}
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}
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