what do java interfaces do code example

Example 1: how to implement a interface in java

interface methods{
 public static hey(); 
}

class scratch implements methods{
  // Required to implement all methods declared in an interface 
  // Or else the class becomes abstract
  public static hey(){
   System.out.println("Hey"); 
  }
}

Example 2: java interface

public interface Exampleinterface {
	
  public void menthod1();
  
  public int method2();

}

class ExampleInterfaceImpl implements ExampleInterface {


  	public void method1()
    {
        //code here
    }
  
    public int method2()
  	{
    	//code here
  	}

}