自己写的,献丑了,希望对楼主有点帮助 package qq.com.client.view;import java.awt.Dimension; import java.awt.TextField; import java.awt.event.*;import javax.swing.*;public class Login2 extends JFrame { public String[] guo = { "中国", "美国", "英国", "日本", "德国", "意大利", "法国" }; private JPanel jp = new JPanel(); private JPanel jp1 = new JPanel(); private JPanel jp2 = new JPanel(); private JPanel jp3 = new JPanel(); private JPanel jp4 = new JPanel(); private JPanel jp5 = new JPanel(); private JPanel jp6 = new JPanel(); private JPanel jp7 = new JPanel(); private JPanel jp8 = new JPanel(); private JPanel jp9 = new JPanel(); private JPanel jp10 = new JPanel(); JLabel a = new JLabel("选择头像"); ImageIcon[] imageIcon = new ImageIcon[7]; JComboBox b = new JComboBox(); JLabel c = new JLabel("昵称");
JTextField d = new JTextField(5); JLabel e = new JLabel("性别:"); JCheckBox f = new JCheckBox(); JLabel g = new JLabel("男"); JCheckBox h = new JCheckBox(); JLabel i = new JLabel("女"); JLabel j = new JLabel("年龄:"); TextField k = new TextField(); String sb = null; String bs=null; JLabel l = new JLabel("所在地区:"); JComboBox m = new JComboBox(guo); JComboBox n = new JComboBox(); JComboBox o = new JComboBox(); JLabel p = new JLabel("输入密码:"); JTextField q = new JTextField(15); JLabel r = new JLabel("密码由4-16个字符组成,区分大小写"); JLabel s = new JLabel("确认密码:"); JTextField t = new JTextField(15); JLabel u = new JLabel("密保问题"); JTextField v = new JTextField(15); JLabel w = new JLabel("问题答案"); JTextField ww = new JTextField(15); JLabel x = new JLabel("个性签名"); JTextField y = new JTextField(); JButton z = new JButton("取消"); JButton zz = new JButton("提交");
谢谢,就是JTree 谁有案例,发个上来
谢谢,就是JTree 谁有案例,发个上来
请问下拉列表用什么图形编程语言和QQ下拉列表一样
package qq.com.client.view;import java.awt.Dimension;
import java.awt.TextField;
import java.awt.event.*;import javax.swing.*;public class Login2 extends JFrame { public String[] guo = { "中国", "美国", "英国", "日本", "德国", "意大利", "法国" }; private JPanel jp = new JPanel();
private JPanel jp1 = new JPanel();
private JPanel jp2 = new JPanel();
private JPanel jp3 = new JPanel();
private JPanel jp4 = new JPanel();
private JPanel jp5 = new JPanel();
private JPanel jp6 = new JPanel();
private JPanel jp7 = new JPanel();
private JPanel jp8 = new JPanel();
private JPanel jp9 = new JPanel();
private JPanel jp10 = new JPanel(); JLabel a = new JLabel("选择头像");
ImageIcon[] imageIcon = new ImageIcon[7];
JComboBox b = new JComboBox(); JLabel c = new JLabel("昵称");
JTextField d = new JTextField(5); JLabel e = new JLabel("性别:");
JCheckBox f = new JCheckBox();
JLabel g = new JLabel("男");
JCheckBox h = new JCheckBox();
JLabel i = new JLabel("女");
JLabel j = new JLabel("年龄:");
TextField k = new TextField(); String sb = null;
String bs=null;
JLabel l = new JLabel("所在地区:");
JComboBox m = new JComboBox(guo); JComboBox n = new JComboBox();
JComboBox o = new JComboBox(); JLabel p = new JLabel("输入密码:");
JTextField q = new JTextField(15); JLabel r = new JLabel("密码由4-16个字符组成,区分大小写"); JLabel s = new JLabel("确认密码:");
JTextField t = new JTextField(15); JLabel u = new JLabel("密保问题");
JTextField v = new JTextField(15); JLabel w = new JLabel("问题答案");
JTextField ww = new JTextField(15); JLabel x = new JLabel("个性签名");
JTextField y = new JTextField(); JButton z = new JButton("取消");
JButton zz = new JButton("提交");
Box box1 = Box.createHorizontalBox();
Box box2 = Box.createHorizontalBox();
Box box3 = Box.createHorizontalBox();
Box box4 = Box.createHorizontalBox();
Box box5 = Box.createHorizontalBox();
Box box6 = Box.createHorizontalBox();
Box box7 = Box.createHorizontalBox();
Box box8 = Box.createHorizontalBox();
Box box9 = Box.createHorizontalBox();
Box box10 = Box.createHorizontalBox();
Box verbox = Box.createVerticalBox(); public Login2() {
y.setPreferredSize(new Dimension(170, 50));
box1.add(a);
box1.add(Box.createHorizontalStrut(20));
box1.add(b);
box1.add(c);
box1.add(d); box2.add(e);
box2.add(f);
box2.add(g);
box2.add(h);
box2.add(i);
box2.add(j);
box2.add(k); box3.add(l);
box3.add(m);
box3.add(n);
box3.add(o); box4.add(p);
box4.add(q); box5.add(r); box6.add(s);
box6.add(t); box7.add(u);
box7.add(v); box8.add(w);
box8.add(ww); box9.add(x);
box9.add(y); box10.add(z);
box10.add(Box.createHorizontalStrut(40));
box10.add(zz); jp1.add(box1);
jp2.add(box2);
jp3.add(box3);
jp4.add(box4);
jp5.add(box5);
jp6.add(box6);
jp7.add(box7);
jp8.add(box8);
jp9.add(box9);
jp10.add(box10); verbox.add(jp1);
verbox.add(jp2);
verbox.add(jp3);
verbox.add(jp4);
verbox.add(jp5);
verbox.add(jp6);
verbox.add(jp7);
verbox.add(jp8);
verbox.add(jp9);
verbox.add(jp10);
n.addItem("请选择省份");
o.addItem("请选择城市"); for (int j = 0; j < 7; j++) { m.addItem(guo[j]);
} for (int i = 1; i < 7; i++) {
imageIcon[i] = new ImageIcon("./image/" + (i + 1) + ".jpg"); b.addItem(imageIcon[i]); } m.addActionListener(new ActionListener() { @Override
public void actionPerformed(ActionEvent e) {
// TODO Auto-generated method stub
sb = (String) m.getSelectedItem(); if (sb.equals("中国")) {
String[] Sheng = { "北京", "上海", "山东", "山西", "广东", "辽宁",
"湖南", "重庆", "四川", "云南", "黑龙江", "吉林", "广西", "内蒙古",
"陕西", }; n.removeAllItems();
for (int i = 0; i < Sheng.length; i++) {
n.addItem(Sheng[i]);
}
n.addActionListener(new ActionListener(){ @Override
public void actionPerformed(ActionEvent e) {
// TODO Auto-generated method stub
bs = (String) n.getSelectedItem();
if(bs.equals("山东")){
String[] shi ={"济南","青岛","聊城","东营","潍坊","烟台","淄博","济宁","德州","枣庄","滨州","临沂","威海"};
o.removeAllItems();
for(int i=0;i<shi.length;i++){
o.addItem( shi[i]);
}
}
}
} );
} else if (sb.equals("美国")) {
String[] Zhou = { "请选择选择州", " 阿拉巴马州", "阿拉斯加州", "亚利桑那州",
"阿肯色州", "科罗拉多州", "康涅狄格州", "特拉华州", "佛罗里达州", "乔治亚州",
"夏威夷州", "爱达荷州", "伊利诺州", "印地安那州", "爱荷华州", "路易斯安那州",
"缅因州", "马里兰州", "麻萨诸塞州", "明尼苏达州", "内华达州", "新罕布什尔州", };
n.removeAllItems();
for (int i = 0; i < Zhou.length; i++) {
n.addItem(Zhou[i]);
}
}
}
}); this.add(verbox);
this.setTitle("QQ申请");
this.setVisible(true);
this.setBounds(200, 200, 500, 500);
this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
} public static void main(String[] args) {
new Login2();
}}
Exception in thread "main" java.lang.Error: Do not use qq.com.client.view.Login2.add
……
请问这是什么错误??
import javax.swing.JTree;
import javax.swing.filechooser.FileSystemView;
import javax.swing.tree.DefaultMutableTreeNode;public class JTreeTest extends JFrame {
public JTreeTest() {
DefaultMutableTreeNode root = new DefaultMutableTreeNode("我的电脑");
FileSystemView sys = FileSystemView.getFileSystemView();
File[] files = File.listRoots();
for (int i = 0; i < files.length; i++) {//测试的时候最好是把这行代码换成 for (int i = 1; i < 2; i++) { i=1在我机子上 是指定D盘
DefaultMutableTreeNode temp = new DefaultMutableTreeNode(sys.getSystemDisplayName(files[i]));
root.add(temp);
bind(temp,files[i].toString());//测试的时候最好是把这行代码换成 bind(temp,"D:\xxx\xxx");指定一个文件夹,否则遍历整个文件系统会非常慢
}
JTree jtree = new JTree(root);
this.add(jtree);
this.setSize(500, 500);
this.setVisible(true);
}
public void bind(DefaultMutableTreeNode node,String path){
File file = new File(path);
File[] files = file.listFiles();
for(int i=0;files!=null && i<files.length;i++){
File tempFile = files[i];
if(tempFile.isDirectory()){
DefaultMutableTreeNode tempNode = new DefaultMutableTreeNode(tempFile.getName());
node.add(tempNode);
bind(tempNode,tempFile.getAbsolutePath());
}else{
DefaultMutableTreeNode tempNode = new DefaultMutableTreeNode(tempFile.getName());
node.add(tempNode);
}
}
} public static void main(String[] args) {
new JTreeTest();
}
}