JAVA面板布局实例.doc

package client; import java.awt.BorderLayout;import java.awt.Choice;import java.awt.Color;import java.awt.Dimension;import java.awt.Font;import java.awt.Frame;import java.awt.GridLayout;import java.awt.Label;import java.awt.Panel;import java.awt.TextField;import java.awt.Toolkit;import java.awt.event.ActionEvent;import java.awt.event.ActionListener;import java.awt.event.WindowAdapter;import java.awt.event.WindowEvent;import java.sql.Connection; import javax.swing.JButton; import util.SystemSqlInfo; public class Login extends Frame implements ActionListener {?private Panel p = new Panel();?private Panel pc = new Panel();?private Panel ps = new Panel();?private Panel pcw = new Panel();?private Panel pcc = new Panel();?private Panel psn = new Panel();?private Label lsqlName = new Label(SqlName:, Label.RIGHT);?private Label luserName = new Label(UserName:, Label.RIGHT);?private Label lpassword = new Label(Password:, Label.RIGHT);?private Label ldataBase = new Label(Database:, Label.RIGHT);?private Label lIp = new Label(IP:, Label.RIGHT);?// private Label lconnectas = new Label(Connect as:, Label.RIGHT);?private Choice tSqlName = new Choice();?private TextField tUserName = new TextField();?private TextField tPassword = new TextField();?private TextField tDataBase = new TextField();?private TextField tIp = new TextField();?private JButton ok = new JButton(Ok);?private JButton cancel = new JButton(Cancel);?private Connection conn = null; ?/* 构造器 */?public Login() {??/* 面板 布局 */??p.setLayout(new BorderLayout());??this.add(p);??pc.setLayout(new BorderLayout());??psn.setLayout(new GridLayout(1, 3, 20, 5));??p.add(pc, Center);??p.add(ps, South);??pcc.setLayout(new GridLayout(6, 1, 2, 2));??pcw.setLayout(new GridLayout(6, 1, 2, 2));??pc.add(pcc, Center);??pc.add(pcw, West);??pcc.add(tSqlName);??pcc.add(tUserName);??pcc.add(tPassword);??tPassword.setEchoChar(*);??pcc.add(tDataBase);??pcc.add(tIp);??tIp.setText(localhost);??t