Java图形操作界面之单选操作

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        在Java单选框中基本用到的是RadioButton,而在Java图形界面操作中用到的单选框是JRadioButton这个组件,下面就对JRadioButton进行初步的使用和了解。下图是截取的官方api中的解释:


      我仅以用到的部分进行代码的演示:


      代码部分如下:

	/**
	 * 性别
	 */
	String sexStr;
	private void sex() {
		JLabel sexLabel = new JLabel("性\0\0别:");
		sexLabel.setBounds(20, 290, 50, 20);
		JRadioButton manRadioButton = new JRadioButton("男");
		manRadioButton.setBounds(70, 290, 100, 20);
		manRadioButton.setSelected(true);
		manRadioButton.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent e) {

				if (manRadioButton.isSelected()) {
					sexStr = manRadioButton.getText();
				}
			}
		});

		JRadioButton womanRadioButton = new JRadioButton("女");
		womanRadioButton.setBounds(200, 290, 100, 20);
		womanRadioButton.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent e) {
				if (womanRadioButton.isSelected()) {
					sexStr = womanRadioButton.getText();
				}
			}
		});
		
		contentPane.add(sexLabel);
		contentPane.add(manRadioButton);
		contentPane.add(womanRadioButton);
	}
      这样写进行操作的时候,单选框不能达到互斥的效果,也就是两个单选框都是独立的,都能进行各自的操作而不是只能选择其中一个,因此就引入了ButtonGroup对控件进行分组操作,修改后的代码如下所示:

	/**
	 * 性别
	 */
	String sexStr;
	private void sex() {
		JLabel sexLabel = new JLabel("性\0\0别:");
		sexLabel.setBounds(20, 290, 50, 20);
		JRadioButton manRadioButton = new JRadioButton("男");
		manRadioButton.setBounds(70, 290, 100, 20);
		manRadioButton.setSelected(true);
		manRadioButton.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent e) {

				if (manRadioButton.isSelected()) {
					sexStr = manRadioButton.getText();
				}
			}
		});

		JRadioButton womanRadioButton = new JRadioButton("女");
		womanRadioButton.setBounds(200, 290, 100, 20);
		womanRadioButton.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent e) {
				if (womanRadioButton.isSelected()) {
					sexStr = womanRadioButton.getText();
				}
			}
		});
		//此处代码是对JRadioButton进行分组操作以达到互斥效果
		ButtonGroup sexGroup = new ButtonGroup();
		sexGroup.add(manRadioButton);
		sexGroup.add(womanRadioButton);

		contentPane.add(sexLabel);
		contentPane.add(manRadioButton);
		contentPane.add(womanRadioButton);

	}

      

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