Question

在JFrame里 for循环添加控件，如何每次都能让JFrame调整刚好的大小

public myProduct(String Str,int y)
其中y是输入的控件数量。如何能让JFrame根据y值调整自身到刚好的大小呢？？
代码片段：

setAlwaysOnTop(true);
addWindowFocusListener(new myWindowsFouceListener());
setDefaultCloseOperation(JDialog.DISPOSE_ON_CLOSE);
setTitle(Str);

JPanel[] panel=new JPanel[y];
productTF=new JTextField[y];
JLabel[] label=new JLabel[y];
for(int i=0;i<y;i++){
panel[i]=new JPanel();
label[i]=new JLabel(String.valueOf(i+1)+".");
productTF[i]=new JTextField("",10);
productTF[i].setDocument(new LimitedDocument(40));// 文本框允许长度为40
if(i==y-1){
panel[i].setFocusTraversalKeys(KeyboardFocusManager.FORWARD_TRAVERSAL_KEYS, Collections.EMPTY_SET);
panel[i].setFocusTraversalKeys(KeyboardFocusManager.BACKWARD_TRAVERSAL_KEYS, Collections.EMPTY_SET);
productTF[i].addKeyListener(new myKeyListener());
}
panel[i].add(label[i]);
panel[i].add(productTF[i]);
getContentPane().add(panel[i]);
}
setResizable(false);
setVisible(true);

Answer 1

setResizable(false);
setVisible(true);
之后
再
setB.....() 取 panel中的一个的高度 再用高度乘以个数 作为
JFrame 的高度

好久没搞 swing了 不记得 大概思路就这样

Answer 2

// Center the window
Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
Dimension frameSize = frame.getSize();
if (frameSize.height > screenSize.height) {
frameSize.height = screenSize.height;
}
if (frameSize.width > screenSize.width) {
frameSize.width = screenSize.width;
}
frame.setLocation((screenSize.width - frameSize.width) / 2,
(screenSize.height - frameSize.height) / 2);