JLabel如何在JPanel上自定义坐标点?

[nj_yangting]

test.setLocation(50, 50);
这东西好像没用?
是我用法不对还是什么?

[nj_dobetter]

jpanel.setLayout(null);
jpanel.add(jlabel);
jlabel.setLocation(50,50);

[nj_yangting]

很怪阿.我用了空布局后,所有的JLabel全看不到了.但我打印全都的label的位置是正确的.如下

java.awt.Point[x=0,y=0]
java.awt.Point[x=10,y=10]
java.awt.Point[x=20,y=20]
java.awt.Point[x=30,y=30]
java.awt.Point[x=40,y=40]

很怪阿.

[nj_yangting]

public class ShowTest extends JApplet {

private static final long serialVersionUID = 1L;
private JLabel test = null;
private JPanel panel = null;

public void init(){
if(panel==null)
panel = new JPanel();
panel.setLayout(null);
test = new JLabel("Test");
panel.add(test);
test.setLocation(50, 50);
this.add(panel);
}

}
以上是我学习用的源码,很简单.
什么地方错了,只要我把panel.setLayout(null);给注解了 就能显示TEST了?怪

[dracularking]

程序呢 不用layout放不下就有可能无法显示

[nj_yangting]

楼上说的放不下是什么意思
意思是说面板比标签要小?

[nj_yangting]

public void init(){
if(panel==null)
panel = new JPanel();
// panel.setLayout(null);
// this.setLayout(null);
test = new JLabel("Test");
panel.add(test);
test.setLocation(50, 50);

panel.setPreferredSize(new Dimension(400,300));
panel.setVisible(true);

this.add(panel);

this.setPreferredSize(new Dimension(400,300));
this.setVisible(true);

}
现在把init()改成这样还是无法显示

[dracularking]

主要是少了setBounds

import javax.swing.JApplet;
import javax.swing.JLabel;
import javax.swing.JPanel;

public class Test extends JApplet {

    private static final long serialVersionUID = 1L;

    private JLabel test = null;

    private JPanel panel = null;

    public void init() {
        if (panel == null)
            panel = new JPanel();
        panel.setLayout(null);
        test = new JLabel("Test");
        test.setBounds(10, 10, 100, 100);
        this.getContentPane().add(panel);
        panel.add(test);
        this.setSize(300, 300);
        this.setVisible(true);
        test.setLocation(200, 200);
    }

}

[nj_yangting]

谢谢 我也刚查到用setBounds();
结帖发分了

[horizonlyhw]

把lauout設置為null
然后把組建，比如JLabel jl = new JLabel(); jl.setBounds(new Rectangle(int,int,int,int));就可以了～～
最后 別忘了在 容器里添加add(jl,null);