Question

我创建了几个单选按钮但由于某种原因我只能选择一个，如果我选择另一个，之前选择的单选按钮将突然变为未选中状态。

代码：

package demo;

import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.SWT;

public class example {

    protected Shell shell;

    /**
     * Launch the application.
     * @param args
     */
    public static void main(String[] args) {
        try {
            example window = new example();
            window.open();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    /**
     * Open the window.
     */
    public void open() {
        Display display = Display.getDefault();
        createContents();
        shell.open();
        shell.layout();
        while (!shell.isDisposed()) {
            if (!display.readAndDispatch()) {
                display.sleep();
            }
        }
    }

    /**
     * Create contents of the window.
     */
    protected void createContents() {
        shell = new Shell();
        shell.setSize(450, 300);
        shell.setText("SWT Application");

        Button btnRadioButton = new Button(shell, SWT.RADIO);
        btnRadioButton.setBounds(83, 10, 90, 16);
        btnRadioButton.setText("Radio Button");

        Button btnRadioButton_1 = new Button(shell, SWT.RADIO);
        btnRadioButton_1.setBounds(55, 86, 90, 16);
        btnRadioButton_1.setText("Radio Button");

        Button btnRadioButton_2 = new Button(shell, SWT.RADIO);
        btnRadioButton_2.setBounds(179, 158, 90, 16);
        btnRadioButton_2.setText("Radio Button");

        Button btnRadioButton_3 = new Button(shell, SWT.RADIO);
        btnRadioButton_3.setBounds(293, 65, 90, 16);
        btnRadioButton_3.setText("Radio Button");

        Button button = new Button(shell, SWT.RADIO);
        button.setText("Radio Button");
        button.setBounds(303, 103, 90, 16);

        Button button_1 = new Button(shell, SWT.RADIO);
        button_1.setText("Radio Button");
        button_1.setBounds(189, 196, 90, 16);

    }
}

我想要单选按钮1,2和3，因此只能同时选择其中一个。但我希望4,5和6分在一个单独的小组中等。

我该如何解决这个问题，谢谢？

使用示例：

使用单选按钮1,2和3回答问题一

使用单选按钮4,5和6

回答问题二

等

Answer 1

在SWT中，您应该在Composite中创建按钮以形成一个组。所有6个按钮都在同一个复合（shell）中创建，因此它们都在同一个组中。

 <!--   =====================================sessionFactory==================================== -->

<bean id="sessionFactory" class="org.springframework.orm.hibernate4.LocalSessionFactoryBean">
         <property name="dataSource" ref="dataSource"/>
         <property name="packagesToScan" value="com.mavenTest.model"/>
          <property name="hibernateProperties">
            <props>
                <prop key="hibernate.hbm2ddl.auto">create</prop>
                <prop key="hibernate.dialect">org.hibernate.dialect.HSQLDialect</prop>
                <prop key="hibernate.show_sql">true</prop>
                <prop key="hibernate.format_sql">false</prop>
                <prop key="hibernate.generate_statistics">true</prop>
            </props>
         </property>

   </bean>

   <bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close">
        <property name="driverClassName" value="org.hsqldb.jdbcDriver"/>
        <property name="url" value="jdbc:hsqldb:hsql://localhost"/> <!--  jdbc:hsqldb:mem:. -->
        <property name="username" value="sa"/>
        <property name="password" value=""/>
        <property name="maxActive" value="100000"/>
        <property name="maxIdle" value="30"/>
        <property name="maxWait" value="16000"/>
        <property name="minIdle" value="0"/>
</bean>

 <!--   =====================================Bean dependency==================================== -->

 <bean id="empService" class="com.mavenTest.service.EmpService" autowire="byName"/>
<bean id="employeeDAO" class="com.mavenTest.dao.EmpDao"  autowire="byName">
  <property name="sessionFactory"  ref="sessionFactory"></property>
</bean>

Answer 2

您必须使用CheckBoxGroup。

CheckboxGroup类用于将一组Checkbox组合在一起   纽扣。 CheckboxGroup中的一个复选框按钮可以在   在任何特定时间“开启”状态。按任意按钮将其状态设置为   “on”并强制处于“on”状态的任何其他按钮进入   “关闭”状态。

以下代码示例生成一个新的复选框组，其中包含三个   复选框：

awt示例：

CheckboxGroup cbg = new CheckboxGroup();
add(new Checkbox("one", cbg, true));
add(new Checkbox("two", cbg, false));
add(new Checkbox("three", cbg, false));

对于Swing，您必须使用ButtonGroup

//In initialization code:
//Create the radio buttons.
JRadioButton birdButton = new JRadioButton(birdString);
birdButton.setMnemonic(KeyEvent.VK_B);
birdButton.setActionCommand(birdString);
birdButton.setSelected(true);

JRadioButton catButton = new JRadioButton(catString);
catButton.setMnemonic(KeyEvent.VK_C);
catButton.setActionCommand(catString);

JRadioButton dogButton = new JRadioButton(dogString);
dogButton.setMnemonic(KeyEvent.VK_D);
dogButton.setActionCommand(dogString);

JRadioButton rabbitButton = new JRadioButton(rabbitString);
rabbitButton.setMnemonic(KeyEvent.VK_R);
rabbitButton.setActionCommand(rabbitString);

JRadioButton pigButton = new JRadioButton(pigString);
pigButton.setMnemonic(KeyEvent.VK_P);
pigButton.setActionCommand(pigString);

//Group the radio buttons.
ButtonGroup group = new ButtonGroup();
group.add(birdButton);
group.add(catButton);
group.add(dogButton);
group.add(rabbitButton);
group.add(pigButton);

最后，对于SWT，您可以使用Composite

public class RadioButtonComposite {
  public static void main(String[] args) {
    final Display display = new Display();
    final Shell shell = new Shell(display);
    shell.setLayout(new FillLayout());
    Composite composite = new Composite(shell, SWT.NULL);
    composite.setLayout(new RowLayout());

    Button mrButton = new Button(composite, SWT.RADIO);
    mrButton.setText("Mr.");
    Button mrsButton = new Button(composite, SWT.RADIO);
    mrsButton.setText("Mrs.");
    Button msButton = new Button(composite, SWT.RADIO);
    msButton.setText("Ms.");
    Button drButton = new Button(composite, SWT.RADIO);
    drButton.setText("Dr.");

    shell.open();
    // Set up the event loop.
    while (!shell.isDisposed()) {
      if (!display.readAndDispatch()) {
        // If no more entries in event queue
        display.sleep();
      }
    }
    display.dispose();
  }

}

我希望能够同时选择多个复选框？ Java SWT

2 个答案: