java自学之路

java基础之Swing技术
实现一个用户注册界面

package sah;

import java.awt.BorderLayout;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.BorderFactory;
import javax.swing.ButtonGroup;
import javax.swing.JButton;
import javax.swing.JCheckBox;
import javax.swing.JComboBox;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JPasswordField;
import javax.swing.JRadioButton;
import javax.swing.JTextField;
import javax.swing.SwingConstants;

public class RegistTest extends JFrame implements ActionListener {
	private JLabel jl_name = new JLabel("用户名:");
	private JLabel jl_secrete = new JLabel("请输入初始密码:");
	private JLabel jl_secrete2 = new JLabel("请再次输入密码:");
	private JLabel jl_sex = new JLabel("性别:");
	private JLabel jl_hobit = new JLabel("兴趣爱好:");
	private JLabel jl_grade = new JLabel("学历:");
	private JLabel jl_title = new JLabel("欢迎您的加入");
	private JLabel jl_message = new JLabel("请填写用户信息");
	private JButton ok = new JButton("确定");
	private JButton clean = new JButton("清空");
	private JTextField text_name = new JTextField(20);
	private JPasswordField text_secrete = new JPasswordField(20);
	private JPasswordField text_secrete2 = new JPasswordField(20);
	private JRadioButton jrb_man = new JRadioButton("男",true);
	private JRadioButton jrb_woman = new JRadioButton("女");
	/*private JCheckBox jcb_read = new JCheckBox("阅读");
	private JCheckBox jcb_swim = new JCheckBox("游泳");
	private JCheckBox jcb_travel = new JCheckBox("旅游");
	private JCheckBox jcb_other = new JCheckBox("其他");*/
	private String[] hobit = {"阅读","游泳","旅游","其他"};
	private JCheckBox[] jcb_hobit = new JCheckBox[hobit.length];
	private JComboBox jcb_grade = new JComboBox();
	private JPanel jp_hobit = new JPanel();
	private JPanel jp_sex = new JPanel();
	private String[] grade = {"高中","专科","本科","硕士研究生","博士研究生"};
	public RegistTest() {
		// TODO Auto-generated constructor stub
		super("用户注册窗口");
		init();
	}
	
	public void init() {
		setSize(480,300);
		setVisible(true);
		setLocationRelativeTo(null);
		setDefaultCloseOperation(EXIT_ON_CLOSE);
		add(jl_title,BorderLayout.NORTH);
		JPanel jp = new JPanel();
		JPanel jp1 = new JPanel();
		jcb_grade = new JComboBox(grade);
		jp_sex.add(jrb_man);
		jp_sex.add(jrb_woman);
		for(int i =0;i<hobit.length;i++) {
			jcb_hobit[i] = new JCheckBox(hobit[i]);
			jp_hobit.add(jcb_hobit[i]);
		}
		ButtonGroup bg1 = new ButtonGroup();
		ButtonGroup bg2 = new ButtonGroup();
		bg1.add(jrb_man);
		bg1.add(jrb_woman);
		jp.setLayout(new GridLayout(6,2));
		jp.add(jl_name);
		jl_name.setHorizontalAlignment(SwingConstants.RIGHT);
		jl_secrete.setHorizontalAlignment(SwingConstants.RIGHT);
		jl_secrete2.setHorizontalAlignment(SwingConstants.RIGHT);
		jl_sex.setHorizontalAlignment(SwingConstants.RIGHT);
		jl_hobit.setHorizontalAlignment(SwingConstants.RIGHT);
		jl_grade.setHorizontalAlignment(SwingConstants.RIGHT);
		jl_title.setHorizontalAlignment(SwingConstants.CENTER);
		jp.add(text_name);
		jp.add(jl_secrete);
		jp.add(text_secrete);
		jp.add(jl_secrete2);
		jp.add(text_secrete2);
		jp.add(jl_sex);
		jp.add(jp_sex);
		jp.add(jl_hobit);
		jp.add(jp_hobit);
		jp.add(jl_grade);
		jp.add(jcb_grade);
		jp1.add(ok);
		jp1.add(clean);
		add(jp,BorderLayout.CENTER);
		add(jp1,BorderLayout.SOUTH);
		jp.setBorder(BorderFactory.createTitledBorder("请填写用户注册信息"));
		ok.addActionListener(this);
		clean.addActionListener(this);
	}

	@Override
	public void actionPerformed(ActionEvent e) {
		StringBuffer sb = new StringBuffer();
		// TODO Auto-generated method stub
		if(e.getSource().equals(ok)) {
			String name = text_name.getText().trim();
			if(name.equals("")) {
				JOptionPane.showMessageDialog(this, "用户名不能为空,请重新输入");
				text_name.requestFocus(true);
				return;
			}else {
				sb.append("用户名:").append(name);
			}
			String psw = new String(text_secrete.getPassword());
			String repsw = new String(text_secrete2.getPassword());
			if(!psw.equals(repsw)) {
				JOptionPane.showMessageDialog(this, "两次输入的密码不一致");
				text_secrete.requestFocus(true);
				return;
			}else {
				sb.append(";\n密码:").append(psw);
			}
			if(psw.equals("") ) {
				JOptionPane.showMessageDialog(this, "密码不能为空,请重新输入");
				text_secrete.requestFocus(true);
				return;
			}else {
				sb.append(";\n密码:").append(psw);
			}
			String sex = jrb_man.isSelected() ?jrb_man.getText():jrb_woman.getText();
			sb.append(";\n性别:").append(sex).append(";\n兴趣爱好:");
			for(int i =0;i<hobit.length;i++) {
				sb.append(jcb_hobit[i].isSelected()?hobit[i]+",":" ");
			}
			String degree = grade[jcb_grade.getSelectedIndex()]; 
			sb.append(";\n学历:").append(degree);
			JOptionPane.showMessageDialog(this, sb.toString());
		}
		if(e.getSource().equals(clean)) {
			text_name.setText("");
			text_secrete.setText("");
			text_secrete2.setText("");
			jrb_man.setSelected(true);
			for(int i=0;i<grade.length;i++) {
				jcb_hobit[i].setSelected(false);
			}
		}
	}
	
	public static void main(String[] args) {
		RegistTest rst = new RegistTest();
	}
}

运行结果如下