在java中重新绘制一个框架
我已经为在线测验编写了代码。我想通过单击“下一步”按钮来更改问题，但重新绘制不起作用；只有新窗口在工作。 我什至无法隐藏 jftMainFrame，因为它仅适用于 8 个窗口。quest 是一个包含问题和选项的列表，当我单击按钮时，从访问 db.repaint() 访问它时不起作用。 我有 4 个显示标签的单选按钮。我想重新绘制单选按钮的标签，还有问题 请帮我。
JFrame jtfMainFrame, jtfMainFrame1;
nextButton.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
System.out.println("Next question..");
j++;
quest = getCurrentQuestion();
createWindow();
validate();
}
});
I have written code for an online quiz. I would like to change questions by clicking "next" button, but repaint is not working; only new window is working.
i can't even hide jftMainFrame since it works for 8 windows only.quest is a list containing questions and options ,its accessed from access db.repaint() is not working while i click the button.
i have 4 radiobuttons which displays the label.i want to repaint the label of radiobutton and also question
Please help me.
JFrame jtfMainFrame, jtfMainFrame1;
nextButton.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
System.out.println("Next question..");
j++;
quest = getCurrentQuestion();
createWindow();
validate();
}
});
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评论（2）
你的问题肯定不清楚。
你想做什么。如果您只是尝试“重新绘制/刷新”面板或组件，请使用paintImmediately();
例如
希望有帮助
Your question is definitely not clear.
What are you trying to do. If you are simply trying to "repaint/refresh" a panel or a component use paintImmediately();
for example
Hope it helps
我认为您的问题是关于使用 CardLayout，而不是创建运行时有很多顶级容器
I think that your question is about using CardLayout, rather than create lots of Top-Level Comtainers on runtime