java编写图形界面需要用到swing等组件，可以在eclipse中安装windowbuilder来开发窗体，自动生成窗体代码，然后自己再根据需要修改，如：

package mainFrame;

import java.awt.EventQueue;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;

import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JCheckBox;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JPasswordField;
import javax.swing.JTextField;
import javax.swing.SwingConstants;
import javax.swing.UIManager;
import javax.swing.UnsupportedLookAndFeelException;
import javax.swing.border.EmptyBorder;

public class Mian_login extends JFrame {

private JPanel contentPane;
private JTextField text_LoginName;
private JPasswordField Login_password;

/**
* Launch the application.
*/
public static void main(String[] args) {
EventQueue.invokeLater(new Runnable() {
@Override
public void run() {
try {
Mian_login frame = new Mian_login();
frame.setVisible(true);
} catch (Exception e) {
e.printStackTrace();
}
}
});
}

/**
* Create the frame.
*/
public Mian_login() {
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setBounds(500, 200, 443, 300);
setResizable(false);
setTitle(登 录);

/*获取系统按钮样式*/
String lookAndFeel = UIManager.getSystemLookAndFeelClassName();
try {
UIManager.setLookAndFeel(lookAndFeel);
} catch (ClassNotFoundException e1) {
e1.printStackTrace();
} catch (InstantiationException e1) {
e1.printStackTrace();
} catch (IllegalAccessException e1) {
e1.printStackTrace();
} catch (UnsupportedLookAndFeelException e1) {
e1.printStackTrace();
}

contentPane = new JPanel();
contentPane.setBorder(new EmptyBorder(5, 5, 5, 5));
setContentPane(contentPane);
contentPane.setLayout(null);

JPanel panel = new JPanel();
panel.setOpaque(false);
panel.setBounds(0, 0, 434, 272);
contentPane.add(panel);
panel.setLayout(null);

JButton btn_Login = new JButton(\u767B\u5F55);
btn_Login.addMouseListener(new MouseAdapter() {
@Override
public void mouseClicked(MouseEvent e) {
}
});
btn_Login.setBounds(88, 195, 70, 23);
panel.add(btn_Login);

JButton btn_cancel = new JButton(\u53D6\u6D88);
btn_cancel.addMouseListener(new MouseAdapter() {
@Override
public void mouseClicked(MouseEvent e) {
dispose();
}
});
btn_cancel.setBounds(268, 195, 70, 23);
panel.add(btn_cancel);

JLabel lblNewLabel_name = new JLabel(\u7528\u6237\u540D);
lblNewLabel_name.setHorizontalAlignment(SwingConstants.CENTER);
lblNewLabel_name.setOpaque(true);
lblNewLabel_name.setBounds(88, 48, 70, 23);
panel.add(lblNewLabel_name);

JLabel lblNewLabel_passwd = new JLabel(\u5BC6\u7801);
lblNewLabel_passwd.setHorizontalAlignment(SwingConstants.CENTER);
lblNewLabel_passwd.setOpaque(true);
lblNewLabel_passwd.setBounds(88, 102, 70, 23);
panel.add(lblNewLabel_passwd);

JCheckBox chckbx_remember = new JCheckBox(\u8BB0\u4F4F\u5BC6\u7801);
chckbx_remember.setBounds(102, 150, 84, 23);
panel.add(chckbx_remember);

text_LoginName = new JTextField();
text_LoginName.setBounds(182, 48, 156, 23);
panel.add(text_LoginName);
text_LoginName.setColumns(10);

Login_password = new JPasswordField();
Login_password.setBounds(182, 102, 156, 23);
panel.add(Login_password);

JCheckBox chckbx_AutoLogin = new JCheckBox(\u81EA\u52A8\u767B\u5F55);
chckbx_AutoLogin.setBounds(233, 150, 84, 23);
panel.add(chckbx_AutoLogin);

JLabel Label_background = new JLabel();
Label_background.setIcon(new ImageIcon(E:\\JAVA_workplace\\0002-\u754C\u9762\u8BBE\u8BA1\\images\\background3.jpg));
Label_background.setBounds(0, 0, 437, 272);
contentPane.add(Label_background);

}
}

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