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标题: JAVA GUI 开发---简单登录界面 [打印本页]

作者: 测试积点老人 时间: 2018-12-29 17:02
标题: JAVA GUI 开发---简单登录界面

看起复杂，其实不复杂，嘿嘿！
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.Insets;

import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPasswordField;
import javax.swing.JTextField;

public class LoginJFrameTest {
private JFrame jframe;
private JLabel jlabel,jlabel1;
private GridBagLayout gridbag;
private GridBagConstraints constraints;
private JTextField jtfield1;
private JPasswordField jpfield1;
private JButton jbutton1,jbutton2,jbutton3;

public LoginJFrameTest(){
  jframe = new JFrame();
  jlabel = new JLabel();
  jlabel1 = new JLabel();
  jtfield1 = new JTextField();
  jpfield1 = new JPasswordField();
  gridbag = new GridBagLayout();
  jbutton1 = new JButton();
  jbutton2 = new JButton();
  jbutton3 = new JButton();

  init();
}

private void init(){
  jframe.setTitle("全屏幕测试");
  jlabel.setText("用户名：");
  jlabel1.setText("密码：");
  jbutton1.setText("登录");
  jbutton2.setText("退出");
  jbutton3.setText("更改密码");
  jframe.setUndecorated(true);
  jframe.getGraphicsConfiguration().getDevice().setFullScreenWindow(jframe);
  jframe.setLayout(gridbag);

   //用户名文本框显示
   constraints = getGridBagConstraints(0,0,1,1,0,0,GridBagConstraints.CENTER,
      GridBagConstraints.NONE,new Insets(10,0,10,0),0,0);

   gridbag.setConstraints(jlabel, constraints);
  jframe.add(jlabel);

  //用户名输入框显示
   constraints = getGridBagConstraints(1,0,1,1,0,0,GridBagConstraints.CENTER,
      GridBagConstraints.NONE,new Insets(10,0,10,0),100,0);

   gridbag.setConstraints(jtfield1, constraints);
   jframe.add(jtfield1);

   //密码文本框显示
   constraints = getGridBagConstraints(0,1,1,1,0,0,GridBagConstraints.CENTER,
   GridBagConstraints.NONE,new Insets(10,0,10,0),0,0);
   gridbag.setConstraints(jlabel1, constraints);
   jframe.add(jlabel1);

   //密码输入框显示
  constraints = getGridBagConstraints(1,1,1,1,0,0,GridBagConstraints.CENTER,
   GridBagConstraints.NONE,new Insets(10,0,10,0),100,0);

  gridbag.setConstraints(jpfield1, constraints);
  jframe.add(jpfield1);

  //更改密码按钮显示
  constraints = getGridBagConstraints(0,2,1,1,0,0,GridBagConstraints.CENTER,
   GridBagConstraints.NONE,new Insets(10,0,10,0),0,0);

  gridbag.setConstraints(jbutton3, constraints);
  jframe.add(jbutton3);

  //登录按钮显示
  constraints = getGridBagConstraints(1,2,1,1,0,0,GridBagConstraints.CENTER,
   GridBagConstraints.NONE,new Insets(10,0,10,0),0,0);

gridbag.setConstraints(jbutton1, constraints);
jframe.add(jbutton1);

  //退出按钮显示
  constraints = getGridBagConstraints(2,2,1,1,0,0,GridBagConstraints.CENTER,
   GridBagConstraints.NONE,new Insets(10,0,10,0),0,0);

  gridbag.setConstraints(jbutton2, constraints);
  jframe.add(jbutton2);

}

private static GridBagConstraints getGridBagConstraints(int gridx,int gridy,int gridwidth,
int gridheight,double weightx,double weighty,int anchor,int fill,Insets insets,
int ipadx,int ipady){

return new GridBagConstraints(gridx, gridy, gridwidth, gridheight, weightx, weighty,
   anchor, fill, insets, ipadx, ipady);
}

public void showMe(){
  jframe.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
  jframe.setVisible(true);
}

public static void main(String[] args) {
  new LoginJFrameTest().showMe();
}
}

参数说明：

   gridx=0; //放在第0列
   gridy=0; //放在第0行
   gridwidth=1; //组件的长度
   gridheight=1; //组件的高度
   weightx=10; //组件根据窗口的大小而变化，系数为10，1
   weighty=1;
   anchor=GridBagConstraints.CENTER; //组件大于放置空间位置时，将组件放置在中心
   fill=GridBagConstraints.HORIZONTAL; //显示区域变化时，设置组件是否变化。
   inset=new Insets(0,0,0,0); //设置组件间上下左右间距
   ipadx=0; //设置组件内的间距
   ipady=0;

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