if (radioButton.isSelected()) {
    textField.addFocusListener(new FocusAdapter() {
public void focusGained(FocusEvent e) {
    textField.getFocusListeners();
} public void focusLost(FocusEvent e) {
    // TODO Auto-generated method stub

}
    });
}
用意是当选中单选按钮时,输入焦点在textField中,可是这样不行,没有焦点,哪为大哥帮忙解决一下啊,万分感激!!!

解决方案 »

  1.   

    不用添加焦点处理器,用textField.requestFocus()就行了。
    if(radioButton.isSelected()){
        textField.requestFocus();
    }
      

  2.   

    不行啊,选中radioButton的时候,光标还是不在textField里面啊
      

  3.   

    SWT写的!你看看吧!
    import org.eclipse.swt.SWT;
    import org.eclipse.swt.events.SelectionAdapter;
    import org.eclipse.swt.events.SelectionEvent;
    import org.eclipse.swt.widgets.Button;
    import org.eclipse.swt.widgets.Display;
    import org.eclipse.swt.widgets.Shell;
    import org.eclipse.swt.widgets.Text;public class FocusLost { private Text textField; public static void main(String[] args) {
    try {
    FocusLost window = new FocusLost();
    window.open();
    } catch (Exception e) {
    e.printStackTrace();
    }
    } public void open() {
    final Display display = Display.getDefault();
    final Shell shell = new Shell();
    shell.setSize(236, 129);
    shell.setText("SWT Application");
    // shell.open(); final Button radioButton = new Button(shell, SWT.RADIO);
    radioButton.setText("radio button");
    radioButton.setBounds(30, 14, 120, 30);
    radioButton.addSelectionListener(new SelectionAdapter() {
    public void widgetSelected(final SelectionEvent e) {
    if (radioButton.getSelection()) {
    textField.setFocus();
    }
    }
    });

    textField = new Text(shell, SWT.BORDER);
    textField.setBounds(30, 58, 120, 30);
    shell.layout();
    while (!shell.isDisposed()) {
    if (!display.readAndDispatch())
    display.sleep();
    }
    }}
      

  4.   

    不可能,就是:
            if(jRadioButton1.isSelected()){
                jTextField1.requestFocus();
            }
    我自己试过了,完全可以。
      

  5.   

    兄弟,谢你的好意了,可是偶不懂SWT啊,也没有环境和SWT包包,运行不了.
    只能哭了....
      

  6.   

    import java.awt.TextField;
    import javax.swing.UIManager;
    import javax.swing.UnsupportedLookAndFeelException;
    public class NewJFrame extends javax.swing.JFrame {
        public NewJFrame() {
            initComponents();
        }
        private void initComponents() {
            jRadioButton1 = new javax.swing.JRadioButton();
            jTextField1 = new javax.swing.JTextField();
            getContentPane().setLayout(new java.awt.FlowLayout());
            setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
            jRadioButton1.setText("Focus!");
            jRadioButton1.setBorder(javax.swing.BorderFactory.createEmptyBorder(0, 0, 0, 0));
            jRadioButton1.setMargin(new java.awt.Insets(0, 0, 0, 0));
            jRadioButton1.addActionListener(new java.awt.event.ActionListener() {
                public void actionPerformed(java.awt.event.ActionEvent evt) {
                    jRadioButton1ActionPerformed(evt);
                }
            });
            getContentPane().add(jRadioButton1);
            jTextField1.setText("jTextField1");
            getContentPane().add(jTextField1);
            pack();
        }    private void jRadioButton1ActionPerformed(java.awt.event.ActionEvent evt) {                                              
            if(jRadioButton1.isSelected()){
                jTextField1.requestFocus();
            }
        }                                             
        public static void main(String args[]) throws ClassNotFoundException, InstantiationException, IllegalAccessException, UnsupportedLookAndFeelException {
            UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
            java.awt.EventQueue.invokeLater(new Runnable() {
                public void run() {
                    new NewJFrame().setVisible(true);
                }
            });
        }
        private javax.swing.JRadioButton jRadioButton1;
        private javax.swing.JTextField jTextField1;
    }
      

  7.   

    你给RadioButton添加的哪个监听器?
      

  8.   

    ActionListener
    就是这一行:
    jRadioButton1.addActionListener(new java.awt.event.ActionListener() {
    public void actionPerformed(java.awt.event.ActionEvent evt) {
    jRadioButton1ActionPerformed(evt);
    }
    });
      

  9.   

    然后:
    private void jRadioButton1ActionPerformed(java.awt.event.ActionEvent evt) {
       if(jRadioButton1.isSelected()){
          jTextField1.requestFocus();
       }

      

  10.   

    开始添的是addMouseListener()......