我正在尝试使用Jlabel和3个单选按钮按降序填充boxlayout。该程序编译正常但随后错误输出错误BoxLayout无法共享。我见过有人说这个错误是因为他们试图将它附加到jframe,但在这种情况下,jpanel被赋予布局而不是框架。这是编译窗口的代码段。
JPanel mainPanel = new JPanel();
mainPanel.setLayout(new BorderLayout());
JPanel effortButtons = new JPanel();
JPanel skillButtons = new JPanel();
effortButtons.setLayout(new BoxLayout(mainPanel, BoxLayout.Y_AXIS));
skillButtons.setLayout(new BoxLayout(mainPanel, BoxLayout.Y_AXIS));
effortButtons.add(effortHeader);//this is what gives the error
effortButtons.add(oneEffort);
effortButtons.add(twoEffort);
effortButtons.add(threeEffort);
skillButtons.add(skillHeader);
skillButtons.add(oneSkill);
skillButtons.add(twoSkill);
skillButtons.add(threeSkill);
mainPanel.add(effortButtons, BorderLayout.WEST);
mainPanel.add(skillButtons, BorderLayout.EAST);
mainPanel.add(studentName, BorderLayout.NORTH);
mainPanel.add(next, BorderLayout.SOUTH);
add(mainPanel);
pack();
答案 0 :(得分:3)
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effortButtons.setLayout(new BoxLayout(mainPanel, BoxLayout.Y_AXIS));
您必须将获取布局的组件传递给BoxLayout构造函数。所以这应该是:
effortButtons.setLayout(new BoxLayout(efforButtons, BoxLayout.Y_AXIS));
同样对于我们的其他JPanel - 将其更改为:
skillButtons.setLayout(new BoxLayout(skillButtons, BoxLayout.Y_AXIS));
public BoxLayout(Container target, int axis)
target - 需要布局的容器