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Why default methods got introduced in Java 8

Anjali Sharma answered on January 4, 2023 Popularity 5/10 Helpfulness 2/10

answer Why default methods got introduced in Java 8

Why default methods got introduced in Java 8

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To Provide Backward Compatibility. So that existing interfaces can use the Lambda expression without implementing the methods in the implementation class.

// A simple program to Test Interface default
// methods in java
interface TestInterface
{
    // abstract method
    public void square(int a);
  
    // default method
    default void show()
    {
      System.out.println("Default Method Executed");
    }
}
  
class TestClass implements TestInterface
{
    // implementation of square abstract method
    public void square(int a)
    {
        System.out.println(a*a);
    }
  
    public static void main(String args[])
    {
        TestClass d = new TestClass();
        d.square(4);
  
        // default method executed
        d.show();
    }
}

Popularity 5/10 Helpfulness 2/10 Language javascript

Source: Grepper

Tags: got java-8 javascript

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Contributed on Jan 04 2023

Anjali Sharma

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