truefalseitem.java

利用JAVA开发的简单考试系统

package viewer;

import javax.swing.JRadioButton;
import java.awt.Rectangle;
import model.persistency.PersistentItem;
import javax.swing.ButtonGroup;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;
import javax.swing.JOptionPane;
import java.awt.Point;
import java.awt.Dimension;

/**
 * <p>Title: </p>
 *  判断题框架
 * <p>Description: </p>
 *  对于判断题调用判断题框架，对用户选择的答案记录在父框架的答案属性中
 */
public class TrueFalseItem extends TestFrame{
    PersistentItem item; //当前题目

    ButtonGroup g = new ButtonGroup();
    JRadioButton trueRadioButton = new JRadioButton();
    JRadioButton falseRadioButton = new JRadioButton();
    /**
     * constructor
     * @param it PersistentItem   当前题目
     */
    public TrueFalseItem(PersistentItem it) {
        super(it);
        this.item = it;
        try {
            jbInit();
        } catch (Exception ex) {
            ex.printStackTrace();
        }
    }

    private void jbInit() throws Exception {
         setSize(new Dimension(525, 440));
        setTitle("OLTS System");


        trueRadioButton.setText("True");
        trueRadioButton.setBounds(new Rectangle(33, 237, 103, 23));
        falseRadioButton.setText("False");
        falseRadioButton.setBounds(new Rectangle(159, 237, 103, 23));

        this.getContentPane().add(trueRadioButton);
        this.getContentPane().add(falseRadioButton);
        g.add(trueRadioButton);
        g.add(falseRadioButton);

        trueRadioButton.addActionListener(new ActionListener(){
      public void actionPerformed(ActionEvent e){
      trace("T",trueRadioButton);}
  });
     falseRadioButton.addActionListener(new ActionListener(){
      public void actionPerformed(ActionEvent e){
      trace("F",falseRadioButton);}
  });
}
 /**
  *  如果选择此按钮，将答案记录于父类答案属性中
  * @param a String             按钮代表的字符串
  * @param cb JRadioButton      按钮名称
  */
 private void trace(String a, JRadioButton cb){
        if(cb.isSelected())
           super.answer = a;
       }
}