Switch Statement in Java;-
- A switch statement is executed one statement for a different condition.
- In switch expression one or N number of cases values.
- The java switch expression is int, long, byte, sort and string.
- If the duplicate value arises, shows compile time error.
Syntax-
switch(expression)
{
case a:
//statement
break;
case b:
//statement
break;
.
.
.
.
default:
//statement
}
Example-
class Student
{
public static void main(String args[])
{
int month=10;
switch (month)
{
case 1:
System.out.println(“Jan”);
break;
case 2:
System.out.println(“Feb”);
break;
case 3:
System.out.println(“March”);
break;
case 4:
System.out.println(“April”);
break;
case 5:
System.out.println(“May”);
break;
case 6:
System.out.println(“June”);
break;
case 7:
System.out.println(“July”);
break;
case 8:
System.out.println(“Aug”);
break;
case 9:
System.out.println(“Sept”);
break;
case 10:
System.out.println(“Oct”);
break;
case 11:
System.out.println(“Novem”);
break;
case 12:
System.out.println(“Decem”);
break;
default:
System.out.println(“data not found”);
}
}
}
Output-
Oct
Khushi Singh
24-Feb-2025Using the `Switch` Statement in Java
In Java programming, the switch statement controls how a tested variable runs different codes according to matched values. The switch statement provides a simpler way than multiple if-else blocks to manage code logic.
The `switch` command tests an expression result and identifies if it matches specific case values. When matching occurs the Java system executes the code segment connected to the match. When a switch statement matches one case value the break command ends all remaining instructions. When no match is found the `default` action runs if one exists.
The switch statement simplifies tasks when handling numbered day-of-the-week choices, calculator operation selection, or menu input processing across various applications. The expression portion of a switch block needs to be an integer, character, string, or enumeration. The float and double data types are not supported in switch conditions.
The switch statement works faster than any other method for handling multiple criteria. The switch statement outperforms multiple if-else blocks because it finds and jumps directly to matching cases which speed up code execution, particularly in big projects. Using special and fixed case labels prevents switching issues during program execution. When developers forget to use the break, the switch statement may accidentally run more case conditions because of this behavior.
In Java development programs you will find the `switch` statement when one action needs to match from many possibilities based on a single variable value. It enhances coding structure and makes code easier to understand with clear methods for choosing options.