java基础10三元运算符

package operator;


//三元运算符
public class Demo08 {
    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 = 80;
        String type = score < 60? "不及格" : "及格";
        //if
        System.out.println(type);
    }
}

package operator;

public class Demo07 {
    public static void main(String[] args) {
        int a = 10;
        int b = 20;

        a+=b;//a=a+b
        a-=b;//a=a-b

        System.out.println(a);

        //字符串连接符 + ，String
        System.out.println(""+a+b);//1020
        System.out.println(a+b+"");//30
    }
}