swing中Tree与滚动条用法实例分析

swing中Tree与滚动条用法实例分析

本文实例讲述了swing中Tree与滚动条用法。分享给大家供大家参考。具体如下：

import java.awt.*;

import java.awt.event.*;

import javax.swhttp://ing.*;

import javaIZELWqyx.swing.tree.*;

public class test extends JApplet{

JTree tree;

JTextField jtf;

public void init(){

Container contentPane = getContentPane();

contentPane.setLayout(new BorderLayout());

DefaultMutableTreeNodhttp://e top = new DefaultMutableTreeNode("Options");

DefaultMutableTreeNode a = new DefaultMutableTreeNode("A");

top.add(a);

DefaultMutableTreeNode a1 = new DefaultMutableTreeNode("A1");

a.add(a1);

DefaultMutableTreeNode a2 = new DefaultMutableTreeNode("A2");

a.add(a2);

DefaultMutableTreeNode b = new DefaultMutableTreeNode("B");

top.add(b);

DefaultMutableTreeNode b1 = new DefaultMutableTreeNode("B1");

b.add(b1);

DefaultMutableTreeNode b2 = new DefaultMutableTreeNode("B2");

b.add(b2);

tree = new JTree(top);

int v = ScrollPaneConstants.VERTICAL_SCROLLBAR_AS_NEEDED;

int h = ScrollPaneConstants.HORIZONTAL_SCROLLBAR_AS_NEEDED;

jscrollPane jsp = new JScrollPane(tree,v,h);

contentPane.add(jsp, BorderLayout.CEhttp://NTER);

jtf = new JTextField("", 20);

contentPane.add(jtf, BorderLayout.SOUTH);

tree.addMouseListener(new MouseAdapter(){

public void mouseClicked(MouseEvent me){

doMouseclicked(me);

}

});

}

void doMouseclicked(MouseEvent me){

TreePath tp = tree.getPathForLocation(me.getX(), me.getY());

if(tp !=null)

jtf.setText(tp.toString());

else

jtf.setText("");

}

}

希望本文所述对大家的java程序设计有所帮助。

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