Java Case Keyword

by Online Tutorials Library July 22, 2022

Java case keyword

The Java case keyword is a conditional label which is used with the switch statement. It contains a block of code which is executed only when the switch value matches with the case.

A switch statement can contain multiple case labels. Each case label must hold a different value. The case label can contain the break statement that terminates the flow of the execution.

Note – The case does not hold the value of boolean, float and double type.

Syntax

  switch(expression){      case value1:       //code to be executed;       break;  //optional    case value2:       //code to be executed;       break;  //optional    default:        code to be executed if all cases are not matched;      }     

Examples of Java case keyword

Example 1: case label holding the string value

  public class CaseExample1 {    public static void main(String[] args) {    String week=”Monday”;    switch(week)    {  case “Monday”: System.out.println(“Monday”);    }  }  }  

Test it Now

Output:

Monday

Example 2: Multiple case labels

  public class CaseExample2 {    public static void main(String[] args) {    String week=”Monday”;    switch(week)    {  case “Monday”:   System.out.println(“Monday”);  break;  case “Tuesday”:  System.out.println(“Tuesday”);  break;  case “Wednesday”:  System.out.println(“Wednesday”);  break;  case “Thursday”:   System.out.println(“Thursday”);  break;  case “Friday”:  System.out.println(“Friday”);  break;  case “Saturday”:   System.out.println(“Saturday”);  break;  case “Sunday”:  System.out.println(“Sunday”);  break;  default :  System.out.println(“default”);  }  }  }  

Test it Now

Output:

Monday

Example 3: case label holding an int value

  public class CaseExample3 {    public static void main(String[] args) {    int num=20;    switch(num)    {  case 10:   System.out.println(“The number is 10”);  break;  case 20:  System.out.println(“The number is 20”);  break;  case 30:  System.out.println(“The number is 30”);  break;    default :  System.out.println(“default”);  }  }  }  

Test it Now

Example 4: case label holding switch statement

  public class CaseExample4 {    public static void main(String[] args) {    String college_name=”BIT”;  int department_id=102;    switch(college_name)    {  case “BIT”:   System.out.println(“BIT”);  switch(department_id)  {  case 101:  System.out.println(“Mechanical Department”);  break;  case 102:  System.out.println(“Computer Department”);  break;  case 103:  System.out.println(“Civil Department”);  break;  }  break;  case “ITS”:  System.out.println(“ITS”);  switch(department_id)  {  case 101:  System.out.println(“Mechanical Department”);  break;  case 102:  System.out.println(“Computer Department”);  break;  case 103:  System.out.println(“Civil Department”);  break;  }  break;  case “ABS”:  System.out.println(“ABS”);  switch(department_id)  {  case 101:  System.out.println(“Mechanical Department”);  break;  case 102:  System.out.println(“Computer Department”);  break;  case 103:  System.out.println(“Civil Department”);  break;  }  break;    default :  System.out.println(“default”);  }  }  }  

Test it Now

Output:

BIT  Computer Department

Next TopicJava Tutorial

Java Case Keyword

Java case keyword

Note – The case does not hold the value of boolean, float and double type.

Syntax

Examples of Java case keyword

Example 1: case label holding the string value

Example 2: Multiple case labels

Example 3: case label holding an int value

Example 4: case label holding switch statement

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