面试题
package operator;
/**
* @author WZT
* @create 2021-03-24 10:51
*/
public class Demo07 {
public static void main(String[] args) {
int a = 10;
int b = 20;
a+=b;//a = a+b
System.out.println(a);
//字符串连接符 + ,String
System.out.println(a+b);
System.out.println(""+a+b);
System.out.println(a+b+"");
}
}
输出
30
50
3020
50
Process finished with exit code 0
三元运算符
package operator;
/**
* @author WZT
* @create 2021-03-24 10:55
*/
public class Demo08 {
public static void main(String[] args) {
//x ? y : z
//如果x==true,则结果为y,否则为z
int score = 80;
String type = score <60 ?"不及格":"及格";
System.out.println(type);
}
}
输出
及格
Process finished with exit code 0