first commit

Java2024.iml

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+<?xml version="1.0" encoding="UTF-8"?>
+<module type="JAVA_MODULE" version="4">
+  <component name="NewModuleRootManager" inherit-compiler-output="true">
+    <exclude-output />
+    <content url="file://$MODULE_DIR$">
+      <sourceFolder url="file://$MODULE_DIR$/src" isTestSource="false" />
+    </content>
+    <orderEntry type="inheritedJdk" />
+    <orderEntry type="sourceFolder" forTests="false" />
+  </component>
+</module>

src/Example07.java

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+public class Example07 {
+    public static void main(String[] args) {
+        int x = 5;
+        if (x < 10) {
+            x ++;  // x = x + 1;
+        }
+
+        System.out.println("x=" + x);
+    }
+}

src/Example08.java

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+public class Example08 {
+    public static void main(String[] args) {
+        int num = 20;
+
+        if (num % 2 == 0) {
+            System.out.println("num是一个偶数");
+        } else {
+            System.out.println("num是一个奇数");
+        }
+    }
+}

src/Example09.java

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+public class Example09 {
+    public static void main(String[] args) {
+        int grade = 75;
+        if (grade > 80) {
+            System.out.println("该成绩的等级为优");
+        } else if (grade > 70) {
+            System.out.println("该成绩的等级是良");
+        } else if (grade > 60) {
+            System.out.println("该成绩的等级是中");
+        } else {
+            System.out.println("该成绩的等级是差");
+        }
+    }
+}

src/Example10.java

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+public class Example10 {
+    public static void main(String[] args) {
+        int x = 0;
+        int y = 10;
+        int max;
+
+        max = x > y ? 100 : 1000;
+
+        System.out.println("max=" + max);
+    }
+}

src/Example11.java

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+public class Example11 {
+    public static void main(String[] args) {
+        int week = 1;
+
+        switch (week) {
+            case 1:
+                System.out.println("星期一");
+                break;
+            case 2:
+                System.out.println("星期二");
+                break;
+            case 3:
+                System.out.println("星期三");
+                break;
+            case 4:
+                System.out.println("星期四");
+                break;
+            case 5:
+                System.out.println("星期五");
+                break;
+            case 6:
+                System.out.println("星期六");
+                break;
+            case 7:
+                System.out.println("星期日");
+                break;
+            default:
+                System.out.println("数值错误");
+        }
+    }
+}

src/Example12.java

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+public class Example12 {
+    public static void main(String[] args) {
+        int x = 5;  // 定义变量x，初始值为1
+        while (x <= 4) {    // // 循环条件
+            System.out.println("x = " + x);     // 条件成立，打印x的值
+            x ++;   // x进行自增
+        }
+    }
+}

src/Example13.java

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+public class Example13 {
+    public static void main(String[] args) {
+        int x = 5;
+        do {
+            System.out.println("x = " + x);
+            x ++;
+        } while (x <= 4);
+    }
+}