所以，我有一个问题，改变面板之间的间距（包含 JTextAreas )添加面板时，请参见以下图片：d

示例

第一次按下按钮时 addTextArea() 被称为。状态1->图片中的状态2。问题是面板上的按钮与新添加的按钮不太接近 WorkDescription ( JTextArea ). 当按钮被多次按下时，它们之间的间隔就会改变。
按钮以前跳得很大，但是； c.weighty = 0.1 - 0.3 跳跃较小。

// The panel is placed in the center of a JFrame (BorderLayout)
public CONSTRUCTOR {

    JPanel panel = new JPanel(new GridBagLayout());
    GridBagConstraints c = new GridBagConstraints();
    // ...
    c.anchor = GridBagConstraints.NORTHWEST;
    c.gridx = 0;
    c.gridy = 0;
    c.weightx = 1;
    c.weighty = 1;
    c.gridwidth = 1;
    c.gridheight = 1;
    // this is how everything looks at (first pic) start.
    panel.add(panel_buttons, c);   // panel_buttons is at the right place
}

添加新属性的方法 WorkDescription ，即 JTextArea :

public void addTextArea() {

    WorkDescription wd = new WorkDescription(); //WorkDescription extends JPanel

    panel.remove(panel_buttons); 
    c.weighty = 0.25;       // I've messed around with the weighty alot.
                            // 0.2-0.25 makes the panel_buttons do the least amout of 'down-jump'
    panel.add(wd, c);

    if(c.gridy < 3 ) {
        c.gridy ++;
        c.weighty = 1;

        panel.add(panel_buttons, c);
    }
    panel.revalidate();
    panel.repaint();
}