import javax.swing.*;
import javax.swing.tree.DefaultMutableTreeNode;public class CerateTree { public CerateTree() {
super();
} public JTree makeTree(){
DefaultMutableTreeNode root = new DefaultMutableTreeNode("root");
DefaultMutableTreeNode country = new DefaultMutableTreeNode("国家");
root.add(country);
JTree tree = new JTree(root);
tree.setEditable(true);
return tree;
}
}class test {
public static void main(String [] args){
JFrame frame = new JFrame();
frame.setSize(500,500);
JTree tree = new CerateDnDTree().makeTree();
JScrollPane sro = new JScrollPane(tree);
frame.add(sro);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setVisible(true);
}
}
现在不想将构造树放在makeTree()方法中,而是构造成一个类.使tree直接能
tree = new CerateTree() 而不用 new CerateTree().makeTree()调用其方法.该怎么修改.. 改了好久老是有问题,谁能帮帮忙,郁闷中..
import javax.swing.tree.DefaultMutableTreeNode;public class CerateTree { public CerateTree() {
super();
} public JTree makeTree(){
DefaultMutableTreeNode root = new DefaultMutableTreeNode("root");
DefaultMutableTreeNode country = new DefaultMutableTreeNode("国家");
root.add(country);
JTree tree = new JTree(root);
tree.setEditable(true);
return tree;
}
}class test {
public static void main(String [] args){
JFrame frame = new JFrame();
frame.setSize(500,500);
JTree tree = new CerateDnDTree().makeTree();
JScrollPane sro = new JScrollPane(tree);
frame.add(sro);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setVisible(true);
}
}
现在不想将构造树放在makeTree()方法中,而是构造成一个类.使tree直接能
tree = new CerateTree() 而不用 new CerateTree().makeTree()调用其方法.该怎么修改.. 改了好久老是有问题,谁能帮帮忙,郁闷中..
解决方案 »
- 连接oracle数据库时 进行查询操作 列名无效
- 查找索引值问题,在线等,马上给分
- 求助:关于数组的问题
- 在JAVA中怎么操作TIFF文件??????
- 一个菜鸟的问题:Exception in thread "main" java.lang.NoClassDefFoundError: HelloWorld
- XDJM给推荐个好点的中文输入法,不用切换就可以输入中文和E文的
- 最近要做一个纯Java application的汉化,老大们给点建议吧??多谢了。。
- 我要转向JAVA了但我觉得除了跨平台,真的找不到JAVA的什么比VC好!给我点动力吧!
- JDK安装后,还要修改AUTOEXEC.BAT么?
- 那里有sun java program考试的模拟题?
- Stack类问题
- 求助::读完文件想删除``但失败```
然后构造写成:
public CerateTree() {
super(this.getDefaultNode());
this.setEditable(true);
}private DefaultMutableTreeNode getDefaultNode(){
DefaultMutableTreeNode root = new DefaultMutableTreeNode("root");
DefaultMutableTreeNode country = new DefaultMutableTreeNode("国家");
root.add(country);
return root;
}
//提示connot reference 'CerateTree().getDefaultNode()'
//before supertype constructor has been called. this.setEditable(true);
}应该怎么写呢? 弄了N久 还是不行..帮帮忙,自己都弄晕了..
谢谢楼上的帮忙...