Create an Object from a GUI - Java

Question

I have this simple class Cat to describe the features of a cat:

public class Cat {

  private String name;
  private String race;
  private String colour;
  private int age;

  public Cat(String name, String race, String colour, int age) {
    this.name=name;
    this.race=race;
    this.colour=colour;
    this.age=age;
  }      

  public String getRace() {
      return race;
  }
  public String getName() {
      return name;
  }
  public String getColour() {
      return colour;
  }
  public int getAge() {
      return age;
  }

}

I also have a CatDemo class that creates an instance of a Frame class (that extends JFrame) from which one can insert cat's information:

public class CatDemo {

    public static void main(String[] args) {
        // TODO Auto-generated method stub

        Frame f = new Frame();
        f.setVisible(true); 
    }

}

This is my GUI:

When one presses OK I have to create an instance of Cat class (I have to create a Cat object with the features inserted in the blanks of the GUI). It's easy to create this instance inside actionPerformed method:

    public void actionPerformed(ActionEvent arg0) {
        Cat c = new Cat(textField.getText(),textField_1.getText(),
                        textField_2.getText(),Integer.parseInt(textField_3.getText())); 
    }

But now I need my Cat object to make something else. How can I use c from CatDemo class (where there is main)?

Answer 1

You need to extend Frame.

public class MyFrame extends Frame {
    public Cat buildCatFromInputFields() {
        ...
        return cat;
    }
}

Also what you need to understand is, that you are leaving your main thread, when entering the AWT world (with that frame). What i mean is, that after you call f.setVisible(true) , your main method and the main thread end! Thus it would be completely advisable to just use your cat inside your ActionHandler methods (like actionPerformed() ).

Answer 2

您可以在主程序和框架中拥有一个公共静态猫列表，当用户按下OK时，您可以执行类似的操作

CatDemo.cats.Add(new Cat(name, race, color, age));