JAVA今日2021.8.4

JAVA今日 If

if01

package JAVASE.struct;

import java.util.Scanner;

public class if01 {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);

        System.out.println("请输入内容：");
        String s = scanner.nextLine();
        //equals：判断字符串是否相等
        if (s.equals("Hello")){
            System.out.println(s);
        }
        System.out.println("End");



        scanner.close();
    }
}

if02

package JAVASE.struct;

import java.util.Scanner;

public class if02 {
    public static void main(String[] args) {
        //考试分数大于60及格，小于60不及格
        Scanner scanner = new Scanner(System.in);
        System.out.println("请输入成绩：");
        int score = scanner.nextInt();

        if (score>=60){
            System.out.println("及格");
        }else{
            System.out.println("不及格");
        }

        scanner.close();
    }
}

JAVA03

package JAVASE.struct;

import java.util.Scanner;

public class if03 {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        System.out.println("请输入成绩");
        int score = scanner.nextInt();
        if (score==100){
            System.out.println("满分");
        }else if (score>=90&&score<100){
            System.out.println("A");
        }else if (score>=80&&score<90){
            System.out.println("B");
        }else if (score>=70&&score<80){
            System.out.println("C");
        }else if (score>=60&&score<70){
            System.out.println("D");
        }else if (score<60&&score>=0){
            System.out.println("不及格");
        }else {
            System.out.println("请输入有效成绩");
        }
        scanner.close();
    }
}

2021.8.4