How To Write Switch Statement In Java

Java switch statement checks multiple conditions by using different cases and if the cases not match then it executes a default statement. The working of a switch case is similar to the if statements and it also control the flow of the program execution.

switch(condition)
{
case label_1:
// statement 1 will be here
break;
case label_2:
// statement 2 will be here
break;
case label_3:
// statement 3 will be here
break;
default:
// statement 4 will be here
}

Program For Switch Statement In Java

Let’s see the following example of the switch-case-

public class DemoSwitch {  
public static void main(String[] args) {  
    int day=1;  
    switch(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;    
    default:
System.out.println("its an amazing day");  
    }  
}  
}

it will produce the following output-

Monday

In switch case break statement is optional means if you don’t want to use a break statement in your program then you can exclude break statement. Let’s see the following example without the break statement-
Example:

public class DemoSwitch1 { 
public static void main(String[] args) { 
int day=1; 
switch(day){ 
case 1: 
case 2: 
case 3: 
case 4: 
case 5: 
System.out.println("Friday");
case 6: 
case 7: 
System.out.println("Weekend"); 
default:
System.out.println("its an amazing day"); 
} 
} 
}

it will produce the following output-

Friday