顺序结构和选择结构

package struct;

import java.util.Scanner;

public class ifDemo01 {
    public static void main(String[]args){
        Scanner scanner=new Scanner(System.in);
        System.out.println("请输入内容:");
        String s=scanner.nextLine();

        if(s.equals("hello")){
            System.out.println(s);
        }
        System.out.println("End");
    }
}

package struct;

public class switchDemo01 {
    public static void main(String[]args){
        String name="许璨";
        //JDK后的新特性 表达式结果可以是字符串！！！
        //字符的本质还是数字

        //反编译java--class(字节码文件）---反编译（IDEA）

        switch(name){
            case"许璨":
                System.out.println("xc666");
                break;
            case"憨憨":
                System.out.println("hh");
                break;
            default:
                System.out.println("你在赣神魔");
                break;
        }


    }
}

//
// Source code recreated from a .class file by IntelliJ IDEA
// (powered by FernFlower decompiler)
//

package struct;

public class switchDemo01 {
    public switchDemo01() {
    }

    public static void main(String[] args) {
        String name = "许璨";
        byte var3 = -1;
        switch(name.hashCode()) {
        case 800000:
            if (name.equals("憨憨")) {
                var3 = 1;
            }
            break;
        case 1138672:
            if (name.equals("许璨")) {
                var3 = 0;
            }
        }

        switch(var3) {
        case 0:
            System.out.println("xc666");
            break;
        case 1:
            System.out.println("hh");
            break;
        default:
            System.out.println("你在赣神魔");
        }

    }
}