Java GroupLayout异常 [英] Java GroupLayout Exception

问题描述

public class Grouplayout implements Runnable {

public static void main(String[] args) {
    SwingUtilities.invokeLater(new Grouplayout());
}

@Override
public void run() {
    JFrame jFrame = new JFrame();
    GroupLayout layout = new GroupLayout(jFrame.getContentPane());
    jFrame.getContentPane().setLayout(layout);
    layout.setAutoCreateGaps(true);
    layout.setAutoCreateContainerGaps(true);

    JLabel jLabel1 = new JLabel("a");
    JLabel jLabel2 = new JLabel("b");
    JLabel jLabel3 = new JLabel("c");
    JLabel jLabel4 = new JLabel("d");

    layout.setVerticalGroup(
        layout.createSequentialGroup()
            .addGroup(layout.createParallelGroup(GroupLayout.Alignment.BASELINE)
                .addComponent(jLabel1)
                .addComponent(jLabel2))
            .addGroup(layout.createParallelGroup(GroupLayout.Alignment.BASELINE)
                .addComponent(jLabel3)
                .addComponent(jLabel4)));

    jFrame.pack();
    jFrame.setVisible(true);
}
}

我正在尝试运行它，但出现以下异常:

I'm trying to run it but i've got the following exception:

线程"AWT-EventQueue-0"中的异常java.lang.IllegalStateException:javax.swing.JLabel [，0,0,0x0，invalid，alignmentX = 0.0，alignmentY = 0.0，border =，flags = 8388608，maximumSize =，minimumSize =，preferredSize =，defaultIcon =，disabledIcon =，horizo​​ntalAlignment = LEADING，horizo​​ntalTextPosition = TRAILING，iconTextGap = 4，labelFor =，text = a，verticalAlignment = CENTER，verticalTextPosition = CENTER]未附加到水平组

出什么问题了?我该如何解决?

What's the problem? How can I fix it?

推荐答案

您必须同时指定水平和垂直布局，另请参见

You have to specify both a horizontal and a vertical layout, also see GroupLayout giving error with java swing

我建议您使用一种工具来帮助您构建GUI.

I suggest you use a tool to help you build the GUI.

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