java单选框能调整大小吗_java setBounds 不能改变JRadioButton的位置大小,求指点

不论我setBounds()里面的参数怎么改,出来的单选框总是没有变化,怎么回事呢?求指点importjava.awt.Dimension;importjava.awt.Toolkit;importjavax.swing.ButtonGroup;importjavax.swin...

不论我 setBounds()里面的参数怎么改,出来的单选框总是没有变化,怎么回事呢?

求指点

import java.awt.Dimension;

import java.awt.Toolkit;

import javax.swing.ButtonGroup;

import javax.swing.JFrame;

import javax.swing.JPanel;

import javax.swing.JRadioButton;

public class landWindow extends JFrame{

JRadioButton adminButton=new JRadioButton("管理员");

JRadioButton keFu1Button=new JRadioButton("客服1");

JRadioButton keFu2Button=new JRadioButton("客服2");

JPanel JPLand;

landWindow(){

setTitle("登录窗口");

setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

setSize(500,400);

setVisible(true);

adminButton.setBounds(50, 80, 100, 100);

keFu1Button.setBounds(100, 80, 100, 100);

keFu2Button.setBounds(150, 80, 100, 100);

ButtonGroup land=new ButtonGroup();

land.add(adminButton);

land.add(keFu1Button);

land.add(keFu2Button);

JPLand=new JPanel();

this.add(JPLand);

JPLand.add(adminButton);

JPLand.add(keFu1Button);

JPLand.add(keFu2Button);

Toolkit toolkit=Toolkit.getDefaultToolkit();

Dimension screen=toolkit.getScreenSize();

int x=screen.width-this.getWidth()>>1;

int y=((screen.height-this.getHeight())>>1)-32;

this.setLocation(x, y);

}

public static void main(String[] args) {

landWindow landWindow=new landWindow();

}

}

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