feat: Java Scanner demo

niumoo · niumoo · commit 18b86f3083a1 · 2023-04-21T17:09:12.000+08:00
diff --git a/core-java-modules/core-java-base/src/main/java/com/wdbyte/scanner/ScannerDemo.java b/core-java-modules/core-java-base/src/main/java/com/wdbyte/scanner/ScannerDemo.java
@@ -0,0 +1,13 @@
+package com.wdbyte.scanner;
+
+import java.util.Scanner;
+
+public class ScannerDemo {
+    public static void main(String[] args) {
+        Scanner scanner = new Scanner(System.in);
+        scanner.useDelimiter(System.lineSeparator());
+        System.out.println("请输入一个字符串：");
+        String inputString = scanner.next();
+        System.out.println("你输入的字符串是：" + inputString);
+    }
+}
diff --git a/core-java-modules/core-java-base/src/main/java/com/wdbyte/scanner/ScannerDemo2.java b/core-java-modules/core-java-base/src/main/java/com/wdbyte/scanner/ScannerDemo2.java
@@ -0,0 +1,16 @@
+package com.wdbyte.scanner;
+
+import java.util.Scanner;
+
+public class ScannerDemo2 {
+    public static void main(String[] args) {
+        Scanner scanner = new Scanner(System.in);
+        System.out.println("请输入一个整数：");
+        int inputInt = scanner.nextInt();
+        System.out.println("你输入的整数是：" + inputInt);
+
+        System.out.println("请输入一个浮点数：");
+        double inputDouble = scanner.nextDouble();
+        System.out.println("你输入的浮点数是：" + inputDouble);
+    }
+}
diff --git a/core-java-modules/core-java-base/src/main/java/com/wdbyte/scanner/ScannerDemo3.java b/core-java-modules/core-java-base/src/main/java/com/wdbyte/scanner/ScannerDemo3.java
@@ -0,0 +1,15 @@
+package com.wdbyte.scanner;
+
+import java.io.File;
+import java.io.FileNotFoundException;
+import java.util.Scanner;
+
+public class ScannerDemo3 {
+    public static void main(String[] args) throws FileNotFoundException {
+        File inputFile = new File("pom.xml");
+        Scanner scanner = new Scanner(inputFile);
+        while (scanner.hasNextLine()) {
+            System.out.println(scanner.nextLine());
+        }
+    }
+}
