条件运算符

package operator; //**三元运算符 public class Demo08 { public static void main(String[] args) {//x ? y : x ** //**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";//**必须掌握 ** //if System.out*.println(type);

} }

扩展赋值运算符

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); System.out*.println(a+b+""); } }