Java 将MouseListener添加到arraylist中的标签

这是我在这里的第一篇文章，我尝试搜索一个已有的主题，但找不到任何与数组列表相关的内容

我需要将addMouseListener设置为在

ArrayList

中生成的所有

JLabel

有两个数组，

smLabelList

和

llabellist

。这些包含两种类型的JLabel，

smBay

和

lrBay

——它们是使用for循环生成并添加到我的面板中的

第一个问题是，向列表中的对象添加操作侦听器的最佳方法是什么

第二个问题是，getSource（）==smBay还是smLabelList数组

非常感谢——我今年刚接触java，只学了几个月

package Despatch;

import java.util.ArrayList;
import java.awt.Color;
import java.awt.GridLayout;
import java.awt.event.*;
import javax.swing.*;
import java.util.*;

class GUI extends JPanel implements ActionListener {

    JPanel buttonPnl;
    JPanel topPnl;
    JPanel bottomPnl;
    JLabel smBay;
    JButton boxButton; //creates variable
    JButton tubeButton;
    JButton envelopeButton;
    JButton clearButton;
    JButton saveButton;
    JButton loadButton;
    JButton chargeButton;
    JButton totalChargeButton;

    int smCount = 0;
    int lrCount = 0;
    double currentCharge;

    private ArrayList<Parcel> smParcel = new ArrayList<Parcel>(9);
    private ArrayList<Parcel> lrParcel = new ArrayList<Parcel>(4);

    //array list for bay JLabels
    List<JLabel> smLabelList = new ArrayList<JLabel>();
    List<JLabel> lrLabelList = new ArrayList<JLabel>();

    //constructor to draw GUI
    GUI() {

        // draw top panel for small/medium parcels
        topPnl = new JPanel(new GridLayout(3, 3));
        topPnl.setBorder(BorderFactory.createLineBorder(Color.BLUE));
        topPnl.setOpaque(true);

        for (int i = 0; i < (3 * 3); i++) {

            JLabel smBay = new JLabel();
            smBay.setBorder(BorderFactory.createLineBorder(Color.BLUE));

            smLabelList.add(smBay);
            topPnl.add(smBay);
        }

        // draw bottom panel for large parcels
        bottomPnl = new JPanel(new GridLayout(2, 4));
        bottomPnl.setBorder(BorderFactory.createLineBorder(Color.BLUE));
        bottomPnl.setOpaque(true);

        for (int i = 0; i < (1 * 4); i++) {

            JLabel lrBay = new JLabel();
            lrBay.setBorder(BorderFactory.createLineBorder(Color.BLUE));
            lrLabelList.add(lrBay);
            bottomPnl.add(lrBay);
        }

        //add actionlisteners to bays???
            for (int i = 0; i < 9; ++i) {
            smLabelList.get(i).addMouseListener(null);
        }



        buttonPnl = new JPanel(new GridLayout(8, 1));// create new button panel object

        boxButton = new JButton("Add Box Package");
        buttonPnl.add(boxButton);

        tubeButton = new JButton("Add Tube Package");
        buttonPnl.add(tubeButton); // draws tube button

        envelopeButton = new JButton("Add Envelope Package");
        buttonPnl.add(envelopeButton); // draws envelope button

        clearButton = new JButton("Clear");
        buttonPnl.add(clearButton); // draws envelope button

        saveButton = new JButton("Save");
        buttonPnl.add(saveButton); // draws save button

        loadButton = new JButton("Load");
        buttonPnl.add(loadButton);// draws load button;

        chargeButton = new JButton("Current Charge");
        buttonPnl.add(chargeButton);// draws charge button;

        totalChargeButton = new JButton("Total Charge");
        buttonPnl.add(totalChargeButton);// draws charge button;

        boxButton.addActionListener(this);
        tubeButton.addActionListener(this);
        envelopeButton.addActionListener(this);
        clearButton.addActionListener(this);
        saveButton.addActionListener(this);
        loadButton.addActionListener(this);
        chargeButton.addActionListener(this);
        totalChargeButton.addActionListener(this);



    }//end of construct

    public void actionPerformed(ActionEvent ae) {
        //find out which button has been pressed
        if (ae.getSource() == boxButton) {

            addBox();//calls the addBox method.

        } else if (ae.getSource() == tubeButton) {

            addTube();
        } else if (ae.getSource() == envelopeButton) {
            addEnvelope();
        } else if (ae.getSource() == clearButton) {
            clear();
        } else if (ae.getSource() == saveButton) {
            System.out.println("you pressed the save button");
        } else if (ae.getSource() == loadButton) {
            System.out.println("you pressed the load button");
        } else if (ae.getSource() == chargeButton) {
            currentCharge();

        } else {
            System.out.println("you pressed the total button");

        }

    }

    public void mouseEntered(MouseEvent me) {
    }

    public void mouseExited(MouseEvent me) {
    }

    public void mousePressed(MouseEvent me) {
    }

    public void mouseClicked(MouseEvent me) {
    }

    public void mouseReleased(MouseEvent me) {

        if (me.getSource() == smBay) {
            if (SwingUtilities.isLeftMouseButton(me)) {
                JOptionPane.showMessageDialog(null, "you pressed the left mouse button");
            } else if (SwingUtilities.isMiddleMouseButton(me)) {
                JOptionPane.showMessageDialog(null, "you pressed the middle mouse button");
            } else if (SwingUtilities.isRightMouseButton(me)) {
                JOptionPane.showMessageDialog(null, "you pressed the right mouse button");

            }
        } else {
            JOptionPane.showMessageDialog(null, "doesn't matter");
        }
    }

    public void addBox() {

        int id = 0;
        while (id == 0) {
            try {
                String idStr = JOptionPane.showInputDialog("Please enter Box ID");
                id = Integer.parseInt(idStr);
            } catch (NumberFormatException nfe) {
                JOptionPane.showMessageDialog(null, "Invalid input, please enter a valid ID");
            }
        }

        int dz = 0;
        while ((dz < 1) || (dz > 3)) {
            try {
                String dzStr = JOptionPane.showInputDialog("Please enter a delivery zone");
                dz = Integer.parseInt(dzStr);
            } catch (NumberFormatException nfe) {
                JOptionPane.showMessageDialog(null, "Invalid input, please enter a valid delivery zone between 1 and 3");
            }
        }
        char dzChar = '0';
        if (dz == 1) {
            dzChar = '1';
        } else if (dz == 2) {
            dzChar = '2';
        } else {
            dzChar = '3';
        }

        //function to convert dz integar to a char.
        int boxL = 0;
        while (boxL == 0) {
            try {
                String boxLStr = JOptionPane.showInputDialog("Please enter box length");
                boxL = Integer.parseInt(boxLStr);
            } catch (NumberFormatException nfe) {
                JOptionPane.showMessageDialog(null, "Invalid input, please enter a valid length");
            }
        }

        int boxW = 0;
        while (boxW == 0) {
            try {
                String boxWStr = JOptionPane.showInputDialog("Please enter box width");
                boxW = Integer.parseInt(boxWStr);
            } catch (NumberFormatException nfe) {
                JOptionPane.showMessageDialog(null, "Invalid input, please enter a valid width");
            }
        }

        int boxH = 0;
        while (boxH == 0) {
            try {
                String boxHStr = JOptionPane.showInputDialog("Please enter box height in cm");
                boxH = Integer.parseInt(boxHStr);
            } catch (NumberFormatException nfe) {
                JOptionPane.showMessageDialog(null, "Invalid input, please enter a valid height");
            }
        }

        if (boxH >= 150) //checks if box height is over 150cm
        {
            if (lrCount < 4) {// secondary validation to check that that large array has spare slot

                lrParcel.add(new Box(id, dzChar, boxL, boxW, boxH) {
                });

                JLabel lrBay = lrLabelList.get(lrCount); //create new label from labels array refercing lrCounter
                lrBay.setIcon((lrParcel.get(lrCount).getImage()));

                currentCharge = (currentCharge + lrParcel.get(lrCount).getCharge());
                lrCount++;

                for (Parcel value : lrParcel) {
                    System.out.println(value);

                }
            } else {
                JOptionPane.showMessageDialog(null, "Sorry, there is no room for this parcel!");

            }
        } else {
            if (smCount < 9) {

                smParcel.add(new Box(id, dzChar, boxL, boxW, boxH) {
                });

                JLabel smBay = smLabelList.get(smCount); //create new label from labels array refercing lrCounter
                smBay.setIcon((smParcel.get(smCount).getImage()));

                currentCharge = (currentCharge + smParcel.get(smCount).getCharge());
                smCount++;
                //loop to print contents of array - for testing only.
                for (Parcel value : smParcel) {
                    System.out.println(value);
                }
            } else {
                JOptionPane.showMessageDialog(null, "Sorry, there is no room for this parcel!");
            }

        }

    }

    public void addTube() {

        int id = 0;
        while (id == 0) {
            try {
                String idStr = JOptionPane.showInputDialog("Please enter Tube ID");
                id = Integer.parseInt(idStr);
            } catch (NumberFormatException nfe) {
                JOptionPane.showMessageDialog(null, "Invalid input, please enter a valid ID");
            }
        }

        int dz = 0;
        while ((dz < 1) || (dz > 3)) {
            try {
                String dzStr = JOptionPane.showInputDialog("Please enter a delivery zone");
                dz = Integer.parseInt(dzStr);
            } catch (NumberFormatException nfe) {
                JOptionPane.showMessageDialog(null, "Invalid input, please enter a valid delivery zone between 1 and 3");
            }
        }
        char dzChar = '0';
        if (dz == 1) {
            dzChar = '1';
        } else if (dz == 2) {
            dzChar = '2';
        } else {
            dzChar = '3';
        }

        int tubeL = 0;
        while ((tubeL >= 250 || tubeL <= 0)) {
            try {
                String tubeLStr = JOptionPane.showInputDialog("Please enter tube length(cm)");
                tubeL = Integer.parseInt(tubeLStr);
            } catch (NumberFormatException nfe) {
                JOptionPane.showMessageDialog(null, "Invalid input, please enter a valid length(cm)");
            }
        }

        if (tubeL >= 150) //checks if tube height is over 1500cm
        {
            if (lrCount < 4) {// secondary validation to check that that large array has spare slot

                lrParcel.add(new Tube(id, dzChar, tubeL) {
                });

                JLabel lrBay = lrLabelList.get(lrCount); //create new label from labels array refercing lrCounter
                lrBay.setIcon((lrParcel.get(lrCount).getImage()));

                currentCharge = (currentCharge + lrParcel.get(lrCount).getCharge());
                lrCount++;

                for (Parcel value : lrParcel) {
                    System.out.println(value);

                }
            } else {
                JOptionPane.showMessageDialog(null, "Sorry, there is no room for this parcel!");

            }
        } else {
            if (smCount < 9) {

                smParcel.add(new Tube(id, dzChar, tubeL) {
                });

                JLabel smBay = smLabelList.get(smCount); //create new label from labels array refercing lrCounter
                smBay.setIcon((smParcel.get(smCount).getImage()));

                currentCharge = (currentCharge + smParcel.get(smCount).getCharge());
                smCount++;

                //loop to print contents of array - for testing only.
                for (Parcel value : smParcel) {
                    System.out.println(value);
                }
            } else {
                JOptionPane.showMessageDialog(null, "Sorry, there is no room for this parcel!");
            }

        }

    }

    public void addEnvelope() {

        {

            int id = 0;
            while (id == 0) {
                try {
                    String idStr = JOptionPane.showInputDialog("Please enter Envelope ID");
                    id = Integer.parseInt(idStr);
                } catch (NumberFormatException nfe) {
                    JOptionPane.showMessageDialog(null, "Invalid input, please enter a valid ID");
                }
            }

            int dz = 0;
            while ((dz < 1) || (dz > 3)) {
                try {
                    String dzStr = JOptionPane.showInputDialog("Please enter a delivery zone");
                    dz = Integer.parseInt(dzStr);
                } catch (NumberFormatException nfe) {
                    JOptionPane.showMessageDialog(null, "Invalid input, please enter a valid delivery zone between 1 and 3");
                }
            }
            char dzChar = '0';
            if (dz == 1) {
                dzChar = '1';
            } else if (dz == 2) {
                dzChar = '2';
            } else {
                dzChar = '3';
            }

            char envelopeS = '0';
            while (envelopeS != 's' && envelopeS != 'm' && envelopeS != 'l') {
                try {
                    String envelopeSStr = JOptionPane.showInputDialog("Please enter the envelope size(s,m,l)");
                    envelopeS = envelopeSStr.charAt(0);
                } catch (NumberFormatException nfe) {
                    JOptionPane.showMessageDialog(null, "Invalid input, please enter a valid size(s,m,l)");
                }
            }

            if (envelopeS == 'l') //checks if envelope height is over 1500cm
            {
                if (lrCount < 4) {// secondary validation to check that that large array has spare slot

                    lrParcel.add(new Envelope(id, dzChar, envelopeS) {
                    });

                    JLabel lrBay = lrLabelList.get(lrCount); //create new label from labels array refercing lrCounter
                    lrBay.setIcon((lrParcel.get(lrCount).getImage()));

                    currentCharge = (currentCharge + lrParcel.get(lrCount).getCharge());
                    lrCount++;

                    for (Parcel value : lrParcel) {
                        System.out.println(value);

                    }
                } else {
                    JOptionPane.showMessageDialog(null, "Sorry, there is no room for this parcel!");

                }
            } else {
                if (smCount < 9) {

                    smParcel.add(new Envelope(id, dzChar, envelopeS) {
                    });

                    JLabel smBay = smLabelList.get(smCount); //create new label from labels array refercing lrCounter
                    smBay.setIcon((smParcel.get(smCount).getImage()));

                    currentCharge = (currentCharge + smParcel.get(smCount).getCharge());
                    smCount++;
                    //loop to print contents of array - for testing only.
                    for (Parcel value : smParcel) {
                        System.out.println(value);
                    }
                } else {
                    JOptionPane.showMessageDialog(null, "Sorry, there is no room for this parcel!");
                }

            }

        }

    }

    public void currentCharge() {

        JOptionPane.showMessageDialog(null, "Total charge for current items is " + currentCharge);

    }

    public void clear() {


        //clears each bay, removes icon
        for (int i = 0; i < smCount; ++i) {
            smLabelList.get(i).setIcon(null);
        }

        //clears each bay, removes icon
        for (int i = 0; i < lrCount; ++i) {
            lrLabelList.get(i).setIcon(null);
        }

        smCount = 0;
        lrCount = 0;
        smParcel.clear();//cleaers the sm parcel array
        lrParcel.clear();// clears the lr parcel array

        currentCharge = 0;
    }
}

包裹寄送；
导入java.util.ArrayList；
导入java.awt.Color；
导入java.awt.GridLayout；
导入java.awt.event.*；
导入javax.swing.*；
导入java.util.*；
类GUI扩展JPanel实现ActionListener{
JPanel按钮npnl；
JPanel-topPnl；
JPanel-bottomPnl；
JLabel-smBay；
JButton boxButton；//创建变量
JButton-tubeButton；
按钮信封按钮；
JButton clearButton；
JButton保存按钮；
JButton加载按钮；
按钮充电按钮；
JButton按钮；
int-smCount=0；
int lrCount=0；
双电流充电；
私有ArrayList smParcel=新ArrayList（9）；
私有ArrayList lrParcel=新ArrayList（4）；
//间隔jlabel的数组列表
List smLabelList=new ArrayList（）；
List lrLabelList=new ArrayList（）；
//构造函数来绘制GUI
GUI（）{
//绘制小型/中型包裹的顶部面板
topPnl=新JPanel（新网格布局（3,3））；
topPnl.setBorder（BorderFactory.createLineBorder（Color.BLUE））；
topPnl.setOpaque（真）；
对于（int i=0；i<（3*3）；i++）{
JLabel smBay=新的JLabel（）；
smBay.setboorder（BorderFactory.createLineBorder（Color.BLUE））；
smLabelList.add（smBay）；
topPnl.add（smBay）；
}
//绘制大包裹的底部面板
bottomPnl=新的JPanel（新的网格布局（2,4））；
bottomPnl.setboorder（BorderFactory.createLineBorder（Color.BLUE））；
bottomPnl.setOpaque（真）；
对于（int i=0；i<（1*4）；i++）{
JLabel lrBay=新的JLabel（）；
lrBay.setboorder（BorderFactory.createLineBorder（Color.BLUE））；
lrLabelList.add（lrBay）；
底部PNL.添加（lrBay）；
}
//将actionlisteners添加到托架？？？
对于（int i=0；i<9；++i）{
smLabelList.get（i）.addMouseListener（null）；
}
buttonPnl=newjpanel（newgridlayout（8，1））；//创建新的按钮面板对象
boxButton=新的JButton（“添加框包”）；
按钮NL.add（框按钮）；
tubeButton=新JButton（“添加管包”）；
buttonPnl.add（tube按钮）；//绘制tube按钮
信封按钮=新的JButton（“添加信封包”）；
buttonPnl.add（信封按钮）；//绘制信封按钮
clearButton=新的JButton（“Clear”）；
buttonPnl.add（clearButton）；//绘制信封按钮
saveButton=新的JButton（“Save”）；
buttonPnl.add（saveButton）；//绘制保存按钮
loadButton=新的JButton（“加载”）；
buttonPnl.add（loadButton）；//绘制加载按钮；
chargeButton=新按钮（“当前充电”）；
buttonPnl.add（chargeButton）；//提取充电按钮；
totalChargeButton=新按钮（“总费用”）；
buttonPnl.add（totalChargeButton）；//提取充电按钮；
addActionListener（这个）；
tubeButton.addActionListener（此）；
envelopeButton.addActionListener（此）；
clearButton.addActionListener（这个）；
saveButton.addActionListener（此）；
loadButton.addActionListener（此）；
chargeButton.addActionListener（此）；
totalChargeButton.addActionListener（此）；
}//施工结束
已执行的公共无效行动（行动事件ae）{
//找出按下了哪个按钮
如果（ae.getSource（）==boxButton）{
addBox（）；//调用addBox方法。
}else if（ae.getSource（）==tubeButton）{
addTube（）；
}else if（ae.getSource（）==信封按钮）{
addEnvelope（）；
}else if（ae.getSource（）==clearButton）{
清除（）；
}else if（ae.getSource（）==saveButton）{
System.out.println（“您按下了保存按钮”）；
}else if（ae.getSource（）==loadButton）{
System.out.println（“您按下了加载按钮”）；
}else if（ae.getSource（）==chargeButton）{
电流电荷（）；
}否则{
System.out.println（“您按下了总计按钮”）；
}
}
公共无效mouseenterned（MouseEvent me）{
}
public void mouseexitted（MouseEvent me）{
}
public void mousePressed（MouseEvent me）{
}
公共无效mouseClicked（MouseEvent me）{
}
公共无效MouseEvent me（MouseEvent me）{
如果（me.getSource（）==smBay）{
if（SwingUtilities.isLeftMouseButton（me））{
showMessageDialog（null，“您按下了鼠标左键”）；
}否则，如果（欺诈行为，是我的鼠标按钮）{
showMessageDialog（null，“您按下了鼠标中键”）；
}else if（SwingUtilities.isRightMouseButton（me））{
showMessageDialog（null，“您按下了鼠标右键”）；
}
}否则{
showMessageDialog（null，“无所谓”）；
}
}
公共void addBox（）{
int id=0；
while（id==0）{
试一试{
字符串idStr=JOptionPane.showInputDialog（“请输入框ID”）；
id=Integer.parseInt（idStr）；
}捕获（编号格式异常）
for (JLabel label : smLabelList)
{
    label.addActionListener(myActionListener);
}
for (JLabel label : lrLabelList)
{
    label.addActionListener(myActionListener);
}