我正在尝试编辑一些我发现用于创建表单的示例代码。示例代码包括4个完全对齐的标签和文本字段。我试图在最后添加一个按钮,但是按钮与屏幕左上角的标签重叠。我该如何解决这个问题?
public class SpringDemo {
private static void createAndShowGUI() {
String[] labels = {"Name: ", "Fax: ", "Email: ", "Address: "};
int labelsLength = labels.length;
//Create and populate the panel.
JPanel p = new JPanel(new SpringLayout());
for (int i = 0; i < labelsLength; i++) {
JLabel l = new JLabel(labels[i], JLabel.TRAILING);
p.add(l);
JTextField textField = new JTextField(10);
l.setLabelFor(textField);
p.add(textField);
}
JButton l = new JButton("Submit");
p.add(l);
//Lay out the panel.
SpringUtilities.makeCompactGrid(p,
labelsLength, 2, //rows, cols
7, 7, //initX, initY
7, 7); //xPad, yPad
//Create and set up the window.
JFrame frame = new JFrame("SpringForm");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
//Set up the content pane.
p.setOpaque(true); //content panes must be opaque
frame.setContentPane(p);
//Display the window.
frame.pack();
frame.setVisible(true);
}
public static void main(String[] args) {
//Schedule a job for the event-dispatching thread:
//creating and showing this application's GUI.
javax.swing.SwingUtilities.invokeLater(new Runnable() {
public void run() {
createAndShowGUI();
}
});
}
}
答案 0 :(得分:1)
问题出现是因为方法makeCompactGrid
将JPanel
压缩到标签及其文本字段所需的大小,并且您没有对按钮施加任何约束以让布局知道在哪里把它。
您可以创建一个空标签并在按钮后添加,然后调用makeCompactGrid
,这会将按钮置于最后一个标签下。
喜欢这个
JButton l = new JButton("Submit");
p.add(l);
p.add(new JLabel());
SpringUtilities.makeCompactGrid(p,
labelsLength + 1, 2, //rows, cols
7, 7, //initX, initY
7, 7); //xPad, yPad
您还可以尝试在按钮上设置约束以强制布局将其放在您想要的位置,但这可能与makeCompactGrid
无法正常工作,因为该方法无法了解按钮。
答案 1 :(得分:0)
可以尝试这种方法吗?
private void addComponent(Container container, Component c, int x, int y,int width, int
height){
c.setBounds(x, y, width, height);
container.add(c);
}
并称之为:
addComponent(container such as JPanel, component such as a JButton, x position, yposition,
width, height);