有没有办法缩短这个重复的代码？ （添加 JPanel 组件）

Question

有没有办法缩短这段代码？这是非常重复的。我在想也许有一种方法可以在我的 Widget class 中创建一个方法 returns 一个对象数组，这样我就可以将我的代码缩短为一行：

ecoPanel.add(economy.getObjects);

economy、standard、advanced、exceptional都是我创建的Widgetclass中的所有Widget个对象

    ecoPanel.add(economy.styleLB); //adds economy textFiield to our ecoPanel
    ecoPanel.add(economy.redLB); //adds economy red label to our ecoPanel
    ecoPanel.add(economy.redTF); //adds red textfield to show inventory amount
    ecoPanel.add(economy.greenLB); //adds economy green label to our ecoPanel
    ecoPanel.add(economy.greenTF); //adds green textfield to show inventory amount
    ecoPanel.add(economy.blueLB);  //adds economy blue label to our ecoPanel
    ecoPanel.add(economy.blueTF); //adds blue textfield to show inventory amount
    ecoPanel.add(economy.yellowLB); //adds economy yellow label to our ecoPanel
    ecoPanel.add(economy.yellowTF); //adds yellow textfield to show inventory amount
    ecoPanel.add(economy.totalLB); //adds economy total label to our ecoPanel
    ecoPanel.add(economy.totalTF); //adds total textfield to show inventory amount

    stdPanel.add(standard.styleLB); //adds standard textFiield to our stdPanel
    stdPanel.add(standard.redLB); //adds standard red label to our stdPanel
    stdPanel.add(standard.redTF); //adds red textfield to show inventory amount
    stdPanel.add(standard.greenLB); //adds standard green label to our stdPanel
    stdPanel.add(standard.greenTF); //adds green textfield to show inventory amount
    stdPanel.add(standard.blueLB);  //adds standard blue label to our stdPanel
    stdPanel.add(standard.blueTF); //adds blue textfield to show inventory amount
    stdPanel.add(standard.yellowLB); //adds standard yellow label to our stdPanel
    stdPanel.add(standard.yellowTF); //adds yellow textfield to show inventory amount
    stdPanel.add(standard.totalLB); //adds standard total label to our stdPanel
    stdPanel.add(standard.totalTF); //adds total textfield to show inventory amount

    advPanel.add(advanced.styleLB); //adds advanced textFiield to our advPanel
    advPanel.add(advanced.redLB); //adds advanced red label to our advPanel
    advPanel.add(advanced.redTF); //adds red textfield to show inventory amount
    advPanel.add(advanced.greenLB); //adds advanced green label to our advPanel
    advPanel.add(advanced.greenTF); //adds green textfield to show inventory amount
    advPanel.add(advanced.blueLB);  //adds advanced blue label to our advPanel
    advPanel.add(advanced.blueTF); //adds blue textfield to show inventory amount
    advPanel.add(advanced.yellowLB); //adds advanced yellow label to our advPanel
    advPanel.add(advanced.yellowTF); //adds yellow textfield to show inventory amount
    advPanel.add(advanced.totalLB); //adds advanced total label to our advPanel
    advPanel.add(advanced.totalTF); //adds total textfield to show inventory amount

    excPanel.add(exceptional.styleLB); //adds exceptional textFiield to our excPanel
    excPanel.add(exceptional.redLB); //adds exceptional red label to our excPanel
    excPanel.add(exceptional.redTF); //adds red textfield to show inventory amount
    excPanel.add(exceptional.greenLB); //adds exceptional green label to our excPanel
    excPanel.add(exceptional.greenTF); //adds green textfield to show inventory amount
    excPanel.add(exceptional.blueLB);  //adds exceptional blue label to our excPanel
    excPanel.add(exceptional.blueTF); //adds blue textfield to show inventory amount
    excPanel.add(exceptional.yellowLB); //adds exceptional yellow label to our excPanel
    excPanel.add(exceptional.yellowTF); //adds yellow textfield to show inventory amount
    excPanel.add(exceptional.totalLB); //adds exceptional total label to our excPanel
    excPanel.add(exceptional.totalTF); //adds total textfield to show inventory amount

Answer 1

也许将您的标签和文本字段放入单独的 ArrayList 中，然后使用 for 循环添加它们会起作用。另外，如果你想把它们全部按顺序排列，你可以制作一个对象数组列表，然后通过使用

找出它们是什么 class

//add a for loop here
String str = arrList.get(i).getClass.getName();
if(str.equals("JLabel"))
{
   panel.add(arrList.get(i));
}
else
{
   // other objects added
}

并继续以这种方式添加它们。

Answer 2

如何在 Widget class 中添加这样的方法：

public Component[] getObjects()
{
    return new Component[]{styleLB,redLB,redTF,greenLB,greenTF,blueLB,blueTF,yellowLB,yellowTF,totalLB,totalTF};
}
public void addAllToPanel(JPanel p)
{
    Component[] arr = getObjects();
    for(Component c:arr)
        p.add(c);
}

那就这样用吧

economy.addAllToPanel(ecoPanel);
standard.addAllToPanel(stdPanel);
advanced.addAllToPanel(advPanel);
exceptional.addAllToPanel(excPanel);