java Jlist 如何实现已有内容刷新

java Jlist 如何实现已有内容刷新

楼主，这三个API，都可以刷新
void
setListData(Object[] listData)
根据一个对象数组构造只读 ListModel，然后对此模型调用 setModel。

void
setListData(Vector listData)
根据一个 Vector 构造只读 ListModel，然后对此模型调用 setModel。

void
setModel(ListModel model)
设置表示列表内容或列表“值”的模型，通知属性更改侦听器，然后清除列表选择。

更新的话，可以使用自身的validate方法；
也可以使用SwingUtiltis.updateComponentUI等方法解决。
示例代码如下：
import java.awt.*;
import java.awt.event.*;

import javax.swing.*;

public class LookAndFeelDemo2 extends JFrame {

private JRadioButton radio1 = new JRadioButton("Metal");
private JRadioButton radio2 = new JRadioButton("Windows");
private JRadioButton radio3 = new JRadioButton("Motif");
private JPanel panelNorth = new JPanel();
private JPanel panelSouth = new JPanel();
private JTextArea area = new JTextArea(6, 20);
private JButton btn = new JButton("button");
private JCheckBox chk = new JCheckBox("checkBox");
private JComboBox cmbLookAndFeel = new JComboBox(new String[] { "Metal",
"Widows", "Motif", "GTK" });

public LookAndFeelDemo2(String title) {
super(title);
Container contentPane = this.getContentPane();
ButtonGroup group = new ButtonGroup();
group.add(radio1);
group.add(radio2);
group.add(radio3);

panelNorth.add(radio1);
panelNorth.add(radio2);
panelNorth.add(radio3);

panelSouth.add(btn);
panelSouth.add(chk);
panelSouth.add(cmbLookAndFeel);

contentPane.add(panelNorth, BorderLayout.NORTH);
contentPane.add(area, BorderLayout.CENTER);
contentPane.add(panelSouth, BorderLayout.SOUTH);
pack();

setVisible(true);
setSize(300, 400);
this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

// 监听Item事件
radio1.addItemListener(new MyItemListener());
radio2.addItemListener(new MyItemListener());
radio3.addItemListener(new MyItemListener());

}

private class MyItemListener implements ItemListener {

public void itemStateChanged(ItemEvent e) {
// 取得点击按钮的名字
String itemName = ((JRadioButton) e.getSource()).getText();
changeLookAndFeel(itemName);
}
}

// 设置外观的private类型方法

private void changeLookAndFeel(String name) {

String lookAndFeel = "";
if (name.equals("Metal")) {
lookAndFeel = "javax.swing.plaf.metal.MetalLookAndFeel";

} else if (name.equals("Windows")) {
lookAndFeel = "com.sun.java.swing.plaf.windows.WindowsLookAndFeel";
} else if (name.equals("Motif")) {
lookAndFeel = "com.sun.java.swing.plaf.motif.MotifLookAndFeel";
}else{
//取得默认的metal外观
lookAndFeel = "javax.swing.plaf.metal.MetalLookAndFeel";
}

try {
UIManager.setLookAndFeel(lookAndFeel);
// 运行时指定LookAndFeel，需要SwingUtilities.updateComponentTreeUI（Component
// c)实现动态的更新
SwingUtilities.updateComponentTreeUI(this);
area.setText("当前外观类名：\n" + lookAndFeel);
} catch (Exception ex) {
ex.printStackTrace();
}

}

public static void main(String[] args) {
new LookAndFeelDemo2("LookAndFeel");
}
}