Instead of writing many if..else statements, you can use the switch statement.
int day = 4;
switch (day) { // every case will be a posibility of "day"
case 1:
System.out.println("Monday");
break;
case 2:
System.out.println("Tuesday");
break;
case 3:
System.out.println("Wednesday");
break;
case 4:
System.out.println("Thursday");
break;
case 5:
System.out.println("Friday");
break;
case 6:
System.out.println("Saturday");
break;
case 7:
System.out.println("Sunday");
break;
}
// Outputs "Thursday" (day 4)
int day = 4;
switch (day) {
case 6:
System.out.println("Today is Saturday");
break;
case 7:
System.out.println("Today is Sunday");
break;
default:
System.out.println("Looking forward to the Weekend");
}
// Outputs "Looking forward to the Weekend"
Without "break"
int day = 6;
switch (day) {
case 6:
System.out.println("Today is Saturday");
case 7:
System.out.println("Today is Sunday");
default:
System.out.println("Looking forward to the Weekend");
}
// Outputs
"Today is Saturday"
"Today is Sunday"
"Looking forward to the Weekend"
标签：case,Java,System,break,Switch,println,day,out From： https://www.cnblogs.com/ShengLiu/p/16920699.html