java.AWT-setSize()方法 [英] java.AWT - setSize() method

问题描述

在下面的程序中使用setSize()方法遇到问题.

I am facing an issue using setSize() method in the below program.

错误:未为类型框架定义方法setSize(int，int).

Error : The method setSize(int,int) is not defined for the type frame.

当我看到Java API时，类框架"具有从类继承的该方法java.awt.Window.当我实例化Frame类时，此对象应具有setSize()方法，因为Frame是Window的派生类.那我为什么会收到这个错误?派生类如何不包含其超类方法?

When I see Java API, "Class Frame" has this Method inherited from class java.awt.Window. As i have instantiated the Frame class, this object should have setSize() method as Frame is derived class of Window. Why am I getting this error then? How can a derived class doesnt contain its superclass method?

public class AwtPrac{

  public static void main(String[] args) {
    Frame fm = new Frame("Java Programm");
    Button b= new Button ("Click Here");
    fm.add(b);
    fm.setVisible(true);
    fm.SetSize(300,300);
    fm.dispose();
  }
}

推荐答案

使用此代码

   import java.awt.Frame;

  public class AwtPrac  {

private static  void init(){
    Frame fm = new Frame("Java Programm");
   fm.setTitle("AwtPrac");
   fm.setSize(300,300);
    fm.setVisible(true);
}

public static void main(String[] args) {
    init();
}

}

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