智能医学工程-计算机程序设计-2025版-教学案例-第06章

eg 6.1.4

// 这是一个单行注释
/*
这是一个
多行注释
*/
/**
 * 这是一个文档注释
 * 用于描述类或方法
 */
public class Main {
    public static void main(String[] args) {
        System.out.println("Hello, World!");
    }

eg 6.1.5

public class Constants {
    public static final int MAX_VALUE = 100;
}

eg 6.1.6

public class Main {
    int instanceVar; // 实例变量

    public void method() {
        int localVar = 10; // 局部变量
    }
}

eg 6.2.1

public class Arithmetic {
    public static void main(String[] args) {
        int a = 10;
        int b = 5;
        System.out.println("加法: " + (a + b));
        System.out.println("减法: " + (a - b));
        System.out.println("乘法: " + (a * b));
        System.out.println("除法: " + (a / b));
        System.out.println("取余: " + (a % b));
    }
}

eg 6.2.2

public class Comparison {
    public static void main(String[] args) {
        int a = 10;
        int b = 5;
        System.out.println("a == b: " + (a == b));
        System.out.println("a != b: " + (a != b));
        System.out.println("a > b: " + (a > b));
        System.out.println("a < b: " + (a < b));
        System.out.println("a >= b: " + (a >= b));
        System.out.println("a <= b: " + (a <= b));
    }
}

eg 6.2.3

public class Logical {
    public static void main(String[] args) {
        boolean a = true;
        boolean b = false;
        System.out.println("a && b: " + (a && b));
        System.out.println("a || b: " + (a || b));
        System.out.println("!a: " + (!a));
    }
}

eg 6.2.4

public class Bitwise {
    public static void main(String[] args) {
        int a = 5; // 0101
        int b = 3; // 0011
        System.out.println("a & b: " + (a & b));
        System.out.println("a | b: " + (a | b));
        System.out.println("a ^ b: " + (a ^ b));
        System.out.println("~a: " + (~a));
        System.out.println("a << 1: " + (a << 1));
        System.out.println("a >> 1: " + (a >> 1));
    }
}

eg 6.2.5

public class Assignment {
    public static void main(String[] args) {
        int a = 10;
        a += 5; // 等于 a = a + 5;
        System.out.println("a += 5: " + a);
        a -= 3; // 等于 a = a - 3;
        System.out.println("a -= 3: " + a);
    }
}