import java.awt.Color;
import java.awt.Rectangle;
import java.awt.event.FocusEvent;
import java.awt.event.FocusListener;
import java.awt.event.KeyAdapter;
import java.awt.event.KeyEvent;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JPasswordField;
import javax.swing.JTextField;
/**
* @Description test
* @ClassName LoginUI
* @Date 2016年12月28日 上午10:42:11
* @Author yanghao Copyright (c) All Rights Reserved, 2016.
*/
public class LoginUI extends JFrame {
private static final long serialVersionUID = -3214668522103694354L;
//
HexTextField login_text_name = new HexTextField("");
HexPasswordField login_text_pwd = new HexPasswordField("");
//
final int w = 360;
final int h = 140;
public LoginUI() {
setSize(w, h);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
this.buildPane();
setVisible(true);
this.requestFocus();
}
private void buildPane() {
JPanel pa = new JPanel();
pa.setLayout(null);
add(pa);
//
JLabel lb_0 = new JLabel("用 户:");
lb_0.setBounds(12, 15, 50, 20);
pa.add(lb_0);
login_text_name.setBounds(60, 15, 100, 20);
login_text_name.setPlaceholder("请输入登录名");//当输入框没有内容时,占位显示信息
pa.add(login_text_name);
JLabel lb_1 = new JLabel("密 码:");
lb_1.setBounds(180, 15, 50, 20);
pa.add(lb_1);
login_text_pwd.setBounds(220, 15, 100, 20);
login_text_pwd.setPlaceholder("请输入登录密码");//当输入框没有内容时,占位显示信息
pa.add(login_text_pwd);
//
JButton login_bt_sub = new JButton("登录");//
login_bt_sub.setBounds((w - 120) / 2, 70, 120, 20);
pa.add(login_bt_sub);
//
HexKeyCall adap = new HexKeyCall() {
public void callBack(KeyEvent e) {
if (e.getExtendedKeyCode() == 10) {
login();
}
}
};
login_text_name.keyPressedCall(adap);
login_text_pwd.keyPressedCall(adap);
}
protected void login() {
String name = login_text_name.getText();
String pwd = String.valueOf(login_text_pwd.getPassword());
System.out.println("input:" + name + "/" + pwd);
}
public static void main(String[] args) {
new LoginUI();
}
}
/**
* @Description 输入框
* @ClassName HexTextField
* @Date 2016年12月28日 上午10:41:45
* @Author yanghao Copyright (c) All Rights Reserved, 2016.
*/
class HexTextField extends JTextField {
final int fontSize = 12;
public HexTextField() {
super();
setFont(new java.awt.Font("宋体", 0, fontSize));
}
public HexTextField(String text) {
super(text);
setFont(new java.awt.Font("宋体", 0, fontSize));
this.setForeground(Color.black);
}
/* 默认显示值 */
/**
* @Description 设置空值时的默认显示
* @param @param text 参数
* @return void 返回类型
* @throws
*/
public void setPlaceholder(String text) {
addFocusListener(focuAdp);
Rectangle bs = this.getBounds();
mask.setText(text);
mask.setForeground(Color.lightGray);
mask.setBounds(2, 0, bs.width - 2, bs.height - 2);
mask.setFont(new java.awt.Font("宋体", 0, 12));
this.add(mask);
}
FocusListener focuAdp = new FocusListener() {
public void focusGained(FocusEvent arg0) {
mask.setVisible(false);
}
public void focusLost(FocusEvent arg0) {
String text = getText().trim();
if (text.length() == 0) {
mask.setVisible(true);
}
}
};
public void setText(String text) {
super.setText(text);
if (mask != null) {
mask.setVisible(false);
}
}
JLabel mask = new JLabel();
/* 默认显示值 */
/* 键盘监听 */
private HexKeyCall call;
KeyAdapter adap = new KeyAdapter() {
public void keyPressed(KeyEvent e) {
call.callBack(e);
}
};
public void keyPressedCall(HexKeyCall call) {
this.call = call;
addKeyListener(adap);
}
/* 键盘监听 */
}
/**
* @Description 密码
* @ClassName HexPasswordField
* @Date 2016年12月28日 上午10:41:19
* @Author yanghao Copyright (c) All Rights Reserved, 2016.
*/
class HexPasswordField extends JPasswordField {
final int fontSize = 12;
public HexPasswordField() {
super();
setFont(new java.awt.Font("宋体", 0, fontSize));
}
public HexPasswordField(String text) {
super(text);
setFont(new java.awt.Font("宋体", 0, fontSize));
}
/* 默认显示值 */
/**
* @Description 设置空值时的默认显示
* @param @param text 参数
* @return void 返回类型
* @throws
*/
public void setPlaceholder(String text) {
addFocusListener(focuAdp);
Rectangle bs = this.getBounds();
mask.setText(text);
mask.setForeground(Color.lightGray);
mask.setBounds(2, 0, bs.width - 2, bs.height - 2);
mask.setFont(new java.awt.Font("宋体", 0, 12));
this.add(mask);
}
FocusListener focuAdp = new FocusListener() {
public void focusGained(FocusEvent arg0) {
mask.setVisible(false);
}
public void focusLost(FocusEvent arg0) {
String text = String.valueOf(getPassword()).trim();
if (text.length() == 0) {
mask.setVisible(true);
}
}
};
JLabel mask = new JLabel();
/* 默认显示值 */
/* 键盘监听 */
public void keyPressedCall(HexKeyCall call) {
this.call = call;
addKeyListener(adap);
}
private HexKeyCall call;
KeyAdapter adap = new KeyAdapter() {
public void keyPressed(KeyEvent e) {
call.callBack(e);
}
};
/* 键盘监听 */
}
/**
* @Description 回调
* @ClassName HexKeyCall
* @Date 2016年12月28日 上午10:42:50
* @Author yanghao Copyright (c) All Rights Reserved, 2016.
*/
interface HexKeyCall {
void callBack(KeyEvent e);
}
