First define an Interface with the method you want to pass as a parameter

public interface Callable {
  public void call(int param);
}

Implement a class with the method

class Test implements Callable {
  public void call(int param) {
    System.out.println( param );
  }
}

// Invoke like that

Callable cmd = new Test();

This allows you to pass cmd as parameter and invoke the method call defined in the interface

public invoke( Callable callable ) { callable.call( 5 ); }

First define an Interface with the method you want to pass as a parameter

public interface Callable {
  public void call(int param);
}

Implement a class with the method

class Test implements Callable {
  public void call(int param) {
    System.out.println( param );
  }
}

// Invoke like that

Callable cmd = new Test();

This allows you to pass cmd as parameter and invoke the method call defined in the interface

public invoke( Callable callable ) {
  callable.call( 5 );
}