Java - Enum equals() method

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Description

The java Enum.equals() method returns true if the specified object is equal to this enum constant.

Declaration

Following is the declaration for java.lang.Enum.equals() method

public final boolean equals(Object other)

Parameters

other − This is the object to be compared for equality with this object.

Return Value

This method returns true if the specified object is equal to this enum constant.

Exception

NA

Example 1

The following example shows the usage of equals() method for various enum values of same enum type where all provided enums are unique.

package com.tutorialspoint;

// enum showing topics covered under Tutorials
enum Tutorials {  
   Java, HTML, Python; 
}  
public class EnumDemo { 
   public static void main(String args[]) {
      Tutorials t1, t2, t3; 
    
      t1 = Tutorials.Java; 
      t2 = Tutorials.HTML; 
      t3 = Tutorials.Python; 
    
      if(t1.equals(t2)) {
         System.out.println(t1 + " is equal to " + t2); 
      } else if(t2.equals(t3)) {
         System.out.println(t2 + " is equal to " + t3); 
      } else if(t1.equals(t3)) { 
         System.out.println(t1 + " is equal to " + t3); 
      } else {
         System.out.println("all 3 topics are different"); 
      }
   } 
} 

Output

Let us compile and run the above program, this will produce the following result −

all 3 topics are different

Example 2

The following example shows the usage of equals() method for various enum values of same enum type where first two enums are same.

package com.tutorialspoint;

// enum showing topics covered under Tutorials
enum Tutorials {  
   Java, HTML, Python; 
}  
public class EnumDemo { 
   public static void main(String args[]) { 
      Tutorials t1, t2, t3; 
    
      t1 = Tutorials.Java; 
      t2 = Tutorials.Java; 
      t3 = Tutorials.Python; 
    
      if(t1.equals(t2)) {
         System.out.println(t1 + " is equal to " + t2); 
      } else if(t2.equals(t3)) {
         System.out.println(t2 + " is equal to " + t3); 
      } else if(t1.equals(t3)) { 
         System.out.println(t1 + " is equal to " + t3); 
      } else {
         System.out.println("all 3 topics are different"); 
      }
   } 
} 

Output

Let us compile and run the above program, this will produce the following result −

Java is equal to Java

Example 3

The following example shows the usage of equals() method for various enum values of same enum type where all provided enums are unique and one enum is null.

package com.tutorialspoint;

// enum showing topics covered under Tutorials
enum Tutorials {  
   Java, HTML, Python; 
}  
public class EnumDemo { 
   public static void main(String args[]) { 
      Tutorials t1, t2, t3;     
      t1 = Tutorials.Java; 
      t2 = Tutorials.HTML; 
      t3 = null; 
    
      if(t1.equals(t2)) {
         System.out.println(t1 + " is equal to " + t2); 
      } else if(t2.equals(t3)) {
         System.out.println(t2 + " is equal to " + t3); 
      } else if(t1.equals(t3)) { 
         System.out.println(t1 + " is equal to " + t3); 
      } else {
         System.out.println("all 3 topics are different"); 
      }
   } 
} 

Output

Let us compile and run the above program, this will produce the following result −

all 3 topics are different