The switch statement is used to execute a block of statements based on the switch expression value. An expression must be of type int, short, byte, or char. A case value should be a constant literal value and can not be duplicated. The expression value is compared with each case value. If a match is found corresponding block of statements will be executed. A break statement is used to terminate the execution of statements. If no case value matches with the expression value then the default block of statements will be executed. If a break statement is not used within the case, all matching cases will be executed.
Syntax:
switch(expression){
case value1:
//block of statements
break;
case value2:
//block of statements
break;
...
default:
//block of statements
break;
}
Program to use switch statement in Java.
public class SwitchStatementExample {
static void switchTest(int caseValue){
switch(caseValue) {
case 0:
System.out.println("Case 0.");
break;
case 1:
System.out.println("Case 1.");
break;
case 2:
System.out.println("Case 2.");
break;
default:
System.out.println("Default Case.");
}
}
public static void main(String args[]){
//method call
switchTest(1);
}
}
Output
Case 1.