使用组件将jlabel添加到jframe [英] Adding jlabel to a jframe using components
问题描述
我有2个课程,
我的主课程创建了一个框架,我希望另一个课程为其添加内容。一些阅读arroudn告诉我,我应该使用组件来执行此操作,但是当我运行我的代码时,框架是空的。
My main class creates a frame and I want another class to add content to it. A bit of reading arroudn told me I should use components to do this however when I run my code the frame is empty.
public static void main(String[] args)
{
// create frame
JFrame frame = new JFrame();
final int FRAME_WIDTH = 800;
final int FRAME_HEIGHT = 600;
// set frame attributes
frame.setSize(FRAME_WIDTH, FRAME_HEIGHT);
frame.setTitle("My Frame");
frame.setVisible(true);
Component1 Com = new Component1();
Component add = frame.add(Com);
}
我的Component类创建一个JLabel
My Component class creates a JLabel
public class Component1 extends JComponent {
public void paintComponent()
{
JLabel label = new JLabel("<html>Some Text</html>");
}
}
我没有得到任何编译错误,但是我我的JFrame中没有任何文字。
I don't get any compile errors, however I dont get any text in my JFrame.
任何人都可以解释我做错了吗?
Can anyone explain what I'm doing wrong?
Chris
推荐答案
您需要添加 JLabel
。最好扩展 JPanel
而不是 JComponent
,因为它有一个默认的布局管理器,无需设置组件大小即可显示任何添加的组件。 paintComponent
用于自定义绘画BTW。
You need to add the JLabel
. Also better to extend JPanel
instead of JComponent
as it has a default layout manager and will make any added components appear without the need to set component sizes. paintComponent
is used for custom painting BTW.
public class Component1 extends JPanel {
Component1() {
JLabel label = new JLabel("<html>Some Text</html>");
add(label);
}
}
这篇关于使用组件将jlabel添加到jframe的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!