GroupLayout:垂直和水平组

Question

我正在尝试创建一个带有GroupLayout的小Jpanel.尽可能地遵循文档以及查看了一些StackOverflow问题,我仍然陷入困境.

错误如下:

线程"AWT-EventQueue-0"中的异常java.lang.IllegalStateException:javax.swing.JButton [,0,0,0x0,invalid,alignmentX = 0.0,alignmentY = 0.5,border = com.apple.laf.AquaButtonBorder $ Dynamic @ 5eef2e7c,旗帜= 288,MAXIMUMSIZE =,=的minimumSize,首选大小=,=的DefaultIcon,disabledIcon =,disabledSelectedIcon =,余量= javax.swing.plaf.InsetsUIResource [顶= 0,左= 2,底部= 0,右= 2 ],paintBorder = true,paintFocus = true,pressedIcon =,rolloverEnabled = false,rolloverIcon =,rolloverSelectedIcon =,selectedIcon =,text = Invest,defaultCapable = true]未附加到垂直组

我知道问题与按钮的连接位置有关.在所有错误明确说明之后.但是,我只是无法弄清楚我应该以什么方式附加它们.有任何想法吗？

    JPanel panel = new JPanel();

    GroupLayout layout = new GroupLayout(panel);
    panel.setLayout(layout);


    panel.setMinimumSize(new Dimension(2000,100));      
    panel.setBorder(BorderFactory.createTitledBorder((cdo.getTicker()) + " : (" + cdo.getCurrency() + ")"));


    layout.setVerticalGroup(
            layout.createSequentialGroup()
            .addGroup(layout.createParallelGroup(GroupLayout.Alignment.BASELINE)
                    .addComponent(new JButton("Invest")))                       
                    .addGroup(layout.createParallelGroup(GroupLayout.Alignment.BASELINE)
                            .addComponent(new JButton("Ignore")))
                            .addGroup(layout.createParallelGroup(GroupLayout.Alignment.BASELINE)
                                    .addComponent(new JButton("Article")))

            );


    layout.setHorizontalGroup(
            layout.createSequentialGroup()
            .addGroup(layout.createParallelGroup(GroupLayout.Alignment.LEADING)
                    .addComponent(new JButton("Invest"))
                    .addComponent(new JButton("Ignore"))
                    .addComponent(new JButton("Article"))
                    )
            );

Answer 1

new JButton("Invest")创建一个新按钮,该按钮与先前使用new创建的按钮不同JButton("Invest").

在布局之前移动按钮的初始化:

JButton investButton = new JButton("Invest");
JButton articleButton = new JButton("Article");
JButton ignoreButton = new JButton("Ignore");

layout.setVerticalGroup(
    layout.createSequentialGroup()
        .addGroup(layout.createParallelGroup(GroupLayout.Alignment.BASELINE)
            .addComponent(investButton))                       
        .addGroup(layout.createParallelGroup(GroupLayout.Alignment.BASELINE)
            .addComponent(ignoreButton))
        .addGroup(layout.createParallelGroup(GroupLayout.Alignment.BASELINE)
            .addComponent(articleButton)));

layout.setHorizontalGroup(
    layout.createSequentialGroup()
        .addGroup(layout.createParallelGroup(GroupLayout.Alignment.LEADING)
            .addComponent(investButton)
            .addComponent(ignoreButton)
            .addComponent(articleButton)));