java - Unsupported major.minor version 52.0

Pictures:

Command Prompt showing versions

Picture of error

Hello.java

import java.applet.Applet;
import java.awt.*;

public class Hello extends Applet {

    // Java applet to draw "Hello World"
    public void paint (Graphics page) {

        page.drawString ("Hello World!", 50, 50);
    }
}

Hello.html

Error

Hello : Unsupported major.minor version 52.0

What may the problem be?