JAVA子窗口關閉時不會整個程式關掉

public class NewJFrame2 extends javax.swing.JFrame {
    String path ="1";


    @Override
    public void setDefaultCloseOperation(int i) {
        super.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE); //To change body of generated methods, choose Tools | Templates.
    }

要這樣寫 才能夠子窗口關閉時不會整個關掉
frame.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE)就OK了。
http://blog.csdn.net/qqliang1314/article/details/6990354