Question

我想展示线性搜索在视觉上的运作方式。我已经创建了ADT类和整数。我还有一个带有按钮的框架，当我点击fillButton时，它会生成一个随机整数数组，显示在一组按钮上。当我点击findButton时，它会查找输入的具体数字。当我在遍历数组时，我想使相应的按钮改变颜色。

我创建了一个类似的程序，它迭代了一组按钮，并在它经过时改变了颜色。我曾经使用过Thread.sleep（），它只是主类。这次我有两节课，我不知道如何去做。我不知道如何在ADT类和GUI类之间建立连接。我之前使用过EventObjects和自定义EventListener，但这仅仅是为了存储对象。任何指向正确方向的帮助都表示赞赏。谢谢。

这是ADT课程的一部分

public class ADT {
private int[] a;
private int nElems;
private int SIZE = 60;

public ADT(){
    a = new int[SIZE];
    nElems=0;
}
public void initialPlacement(int index, int value,int initialCount){
    a[index] = value;
    nElems = initialCount;
}
public int linearSearch(int searchKey){
    int index = 0;
    for(int i = 0; i < nElems; i++){
        if(getVal(i) == searchKey){
            index = i;
            break;
        }
        else{
            index = -1;
        }
    }
    return index;
}

这是GUI类的一部分

public NumberFrame(){///CONSTRUCTOR===========================
        arr = new ADT();
        //CREATE COMPONENTS
        for(int i = 0; i < 60; i++){
             listButtons[i] = new JButton(String.valueOf("_"));
         }
        for(int i = 0; i < 60; i++){
             listLabels[i] = new JLabel(String.valueOf("["+i+"]"));
         }
        for(int i = 0; i < 60; i++){
             listMiniPanels[i] = new JPanel();
             listMiniPanels[i].add(listLabels[i]);
             listMiniPanels[i].add(listButtons[i]);
         }
fillButton.addActionListener(new ActionListener(){
            @Override
            public void actionPerformed(ActionEvent e) {
                    boolean sort = true;
                    if(linearRadio.isSelected()){
                        System.out.println("linear is checked");
                        fill(!sort);//fills half the array and array of buttons with random numbers, unsorted
                    }else if(binaryRadio.isSelected()){
                        System.out.println("binary is checked");
                        fill(sort);//fills half the array with random numbers and sorts it
                    }else{
                        JOptionPane.showMessageDialog(null, "Please check a sorting method");
                    }
            }
        })
findButton.addActionListener(new ActionListener(){
            @Override
            public void actionPerformed(ActionEvent arg0) {
                int index= 0;
                if(numberField.getText().equals("")){
                    System.out.print("Arr size = " + arr.size());
                    JOptionPane.showMessageDialog(null, "You did not enter a number");

                }else {
                    try {
                        int searchKey = Integer.parseInt(numberField.getText());    
                        if(linearRadio.isSelected()){
                            index = arr.linearSearch(searchKey);
                            listButtons[index].setBackground(Color.GREEN);
                            if(index > -1)
                                 JOptionPane.showMessageDialog(null, "Found number " +searchKey + " @ index [" + index + "]");
                                else
                                    JOptionPane.showMessageDialog(null, "No such number");
                        }else{
                            index = arr.binarySearch(searchKey);
                            if(index > -1)
                                 JOptionPane.showMessageDialog(null, "Found number " + searchKey+ " @ index [" + index + "]");
                                else
                                    JOptionPane.showMessageDialog(null, "No such number!");
                        }
                      } catch (NumberFormatException nfe) {
                          System.out.println("Arr size = " + arr.size());
                          JOptionPane.showMessageDialog(null, "Not an integer, pleas try again!");
                      } 
                }
            }   
        });
}//=======CONSTRUCTOR END=============================

在迭代按钮数组时如何使按钮发光？

0 个答案: