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The equals and == operator for Enum data type in Java
We have the Devices Enum with four constants.
enum Devices { LAPTOP, MOBILE, TABLET, DESKTOP; }
We have created some objects and assigned them with the constants.
Let us compare them with both equals() and ==. Firstly, begin with equals() −
if(d1.equals(d2)) System.out.println("Devices are the same."); else System.out.println("Devices are different.");
Now, let us move forward and check for ==
if(d1 == d3) System.out.println("Devices are the same."); else System.out.println("Devices are different.");
The following is the final example demonstrating both equals() and == operator −
Example
public class Demo { enum Devices { LAPTOP, MOBILE, TABLET, DESKTOP; } public static void main(String[] args) { Devices d1, d2, d3, d4; d1 = Devices.LAPTOP; d2 = Devices.LAPTOP; d3 = Devices.TABLET; d4 = Devices.DESKTOP; if(d1.equals(d2)) System.out.println("Devices are the same."); else System.out.println("Devices are different."); if(d1 == d3) System.out.println("Devices are the same."); else System.out.println("Devices are different."); } }
Output
Devices are the same. Devices are different.
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