Java extended assignment operator, conditional operator, ternary operation

Java extended assignment operator, conditional operator, ternary operation

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Java spread operator, connector

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public class Demo7 {
    
    
    public static void main(String[] args) {
    
    
        int a =10;
        int b =20;

        a+=b;//a=a+b
        System.out.println(a);

        a-=b;//a=a-b
        System.out.println(a);
        //字符串连接符 +，String
        System.out.println(""+a+b);

    }
}

Conditional operator

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public class Dome8 {
    
    
    public static void main(String[] args) {
    
    
        //x? y:z
        //如果x==true，则结果为y，否则结果为z

        int score=50;
        String a=score<60?"不及格":"及格";
        System.out.println(a);
    }
}