javadocのエラーが見つかりませんでした。私はJavaの初心者です

Question

MouseWheelDemoのメインメソッドでエラーが発生しました パッケージmousewheeldemo;

import java.awt.*; 

public class MouseWheelDemo extends Frame 
{ 

    private TextArea address; 
    private Button exit; 
    public MouseWheelDemo(String title) 
    { 

    super(title); 
    address = new TextArea("Enter Address,5,40"); 
    exit = new Button("Exit"); 
    Panel north = new Panel(); 
    Panel south = new Panel(); 
    north.add(address); 
    south.add(exit); 
    this.add(north, BorderLayout.NORTH); 
    this.add(south, BorderLayout.SOUTH); 
    ColorChanger listener = new ColorChanger(this); 
    address.addMouseWheelListener(listener); 
    exit.addActionListener(listener); 


    } 

    public static void main(String[] args) 
    { 
    Frame f = MouseWheelDemo("Generate Event from Mouse Wheels"); //here i am getting error[enter image description here][1] 
    f.setSize(500,300); 
    f.setVisible(true); 

    } 
} 

Answer 1

mainメソッド内MouseWheelDemoコンストラクタ呼び出し前newキーワードを追加します。

public static void main(String[] args) { 
    Frame f = new MouseWheelDemo("Generate Event from Mouse Wheels"); 
    f.setSize(500,300); 
    f.setVisible(true); 

}