if else
public class HelloWorld {
public static void main(String[] args) {
boolean isRain = true;
if(isRain) {
System.out.println("天公不作美,在家吃鸡腿");
}else {
System.out.println("天气晴朗,出去浪");
}
int num = 3;
if(num == 1) {
System.out.println("111");
}else if(num == 2){
System.out.println("222");
}else {
System.out.println("333");
}
}
}
switch case
public class HelloWorld {
public static void main(String[] args) {
char grade = 'D';
switch(grade) {
case 'A':
System.out.println("奖金1000元");
break;
case 'B':
System.out.println("奖金2000元");
break;
case 'C':
System.out.println("奖金3000元");
break;
case 'D':
System.out.println("奖金4000元");
break;
default:
System.out.println("啥也不是");
break;
}
}
}