scanner

快捷键

ctrl+D，复制当前行到下一行

与或非

package org.example;

public class demo02 {
    public static void main(String[] args) {
        boolean a = true;
        boolean b=false;
        System.out.println("a&&b："+(a&&b));
        System.out.println(a||b);
        System.out.println(!(a&&b));

        int c = 5;
        boolean d = (c<4)&&(c++<4);
        System.out.println(d);
        System.out.println(c);
    }
}

package Scanner;

import java.util.Scanner;

public class Demo01 {
    public static void main(String[] args) {
        Scanner scanner=new Scanner(System.in);

        System.out.println("请输入数据：");

        String str = scanner.nextLine();

        System.out.println("输出的内容为："+str);

        scanner.close();
    }
}