这就是我在previous question中教给我的actionlistener所做的事情。我要为我的冗长代码首先道歉。我已经修剪了一下。
package testpanel;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.*;
import javax.swing.border.Border;
public class TestPanel {
JFrame Card = new JFrame();
GridBagConstraints c = new GridBagConstraints();
Border etch = BorderFactory.createEtchedBorder(Color.white,Color.gray);
JButton up;
JButton up_1; JButton up_2; JButton up_3; JButton up_4;
JButton up_5; JButton up_6; JButton up_7; JButton up_8;
JButton down;
JButton down_1; JButton down_2; JButton down_3; JButton down_4;
JButton down_5; JButton down_6; JButton down_7; JButton down_8;
JTextField number;
JTextField number_1; JTextField number_2; JTextField number_3;
JTextField number_4; JTextField number_5; JTextField number_6;
JTextField number_7; JTextField number_8;
int value1000 = 0;
int value500 = 0;
int value200 = 0;
int value100 = 0;
int value50 = 0;
int value20 = 0;
int value10 = 0;
int value5 = 0;
int value1 = 0;
int valuecoins = 0;
ActionListener upaction;
ActionListener downaction;
public TestPanel(){
Card.setVisible(true);
Card.setSize(522,500);
Card.setTitle("Frequency Distribution");
Card.setResizable(false);
final Toolkit toolkit = Toolkit.getDefaultToolkit();
Dimension dimension = Toolkit.getDefaultToolkit().getScreenSize();
int x=(int)((dimension.getWidth() - Card.getWidth())/4);
int y=(int)((dimension.getHeight() - Card.getHeight())/2);
Card.setLocation(x, y);
Card.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
JPanel centerpanel = new JPanel();
centerpanel.setBorder(etch);
centerpanel.setPreferredSize(new Dimension(0,324));
centerpanel.setBackground(new Color(0,120,0));
centerpanel.setLayout(new GridBagLayout());
JLabel lbl1000 = new JLabel("1,000.00");
lbl1000.setFont(new Font("Calibri", Font.BOLD, 20));
lbl1000.setForeground(Color.YELLOW);
c.fill = GridBagConstraints.WEST;
c.weightx = 0.5;
c.weighty = 0;
c.gridx = 0;
c.gridy = 0;
c.insets = new Insets(0,30,0,0);
centerpanel.add(lbl1000,c);
JLabel multiply = new JLabel("X");
multiply.setFont(new Font("Calibri", Font.BOLD, 20));
multiply.setForeground(Color.YELLOW);
c.fill = GridBagConstraints.BOTH;
c.weightx = 0.5;
c.weighty = 0;
c.gridx = 1;
c.gridy = 0;
c.insets = new Insets(0,0,0,0);
centerpanel.add(multiply,c);
final JTextField number = new JTextField();
number.setText(value100+"");
number.setColumns(3);
number.setFont(new Font("Calibri", Font.BOLD, 20));
number.setForeground(Color.BLACK);
c.fill = GridBagConstraints.BOTH;
c.weightx = 0.5;
c.weighty = 0;
c.gridx = 2;
c.gridy = 0;
c.insets = new Insets(0,0,0,0);
centerpanel.add(number,c);
upaction = new ActionListener() {
public void actionPerformed(ActionEvent e) {
if(e.getSource() == up){
value100++;
if(value100>0)
{
number.setText(value100+"");
down.setEnabled(true);
}}
if(e.getSource() == up_1){
value500++;
if(value500>0)
{
number_1.setText(value500+"");
down_1.setEnabled(true);
}}
if(e.getSource() == up_2){
value200++;
if(value200>0)
{
number_2.setText(value200+"");
down_2.setEnabled(true);
}}
if(e.getSource() == up_3){
value100++;
if(value100>0)
{
number_3.setText(value100+"");
down_3.setEnabled(true);
}}
if(e.getSource() == up_4){
value50++;
if(value50>0)
{
number_4.setText(value50+"");
down_4.setEnabled(true);
}}
}
};
downaction = new ActionListener() {
public void actionPerformed(ActionEvent e) {
if(e.getSource() == down){
value1000--;
if(value1000>0)
{number.setText(value1000+"");}
if(value1000==0)
{
number.setText(value1000+"");
down.setEnabled(false);
value1000=0;
}}
if(e.getSource() == down_1){
value500--;
if(value500>0)
{number_1.setText(value500+"");}
if(value500==0)
{
number_1.setText(value500+"");
down_1.setEnabled(false);
value500=0;
}}
if(e.getSource() == down_2){
value200--;
if(value200>0)
{number_2.setText(value200+"");}
if(value200==0)
{
number_2.setText(value200+"");
down_2.setEnabled(false);
value200=0;
}}
if(e.getSource() == down_3){
value100--;
if(value100>0)
{number_3.setText(value100+"");}
if(value100==0)
{
number_3.setText(value100+"");
down_3.setEnabled(false);
value100=0;
}}
if(e.getSource() == down_4){
value50--;
if(value50>0)
{number_4.setText(value50+"");}
if(value50==0)
{
number_4.setText(value50+"");
down_4.setEnabled(false);
value50=0;
}}
}
};
up = new JButton("up");
up.setBackground(new Color(224,223,227));
up.setPreferredSize(new Dimension(5,15));
up.addActionListener(upaction);
down = new JButton("down");
down.setBackground(new Color(224,223,227));
down.setPreferredSize(new Dimension(5,15));
down.setEnabled(false);
down.addActionListener(downaction);
JPanel updownpanel = new JPanel();
updownpanel.setPreferredSize(new Dimension(10,10));
updownpanel.setLayout(new BorderLayout());
updownpanel.add(up, BorderLayout.NORTH);
updownpanel.add(down, BorderLayout.SOUTH);
c.fill = GridBagConstraints.BOTH;
c.weightx = 0.5;
c.weighty = 0;
c.gridx = 3;
c.gridy = 0;
c.insets = new Insets(0,0,0,0);
centerpanel.add(updownpanel,c);
JLabel equals = new JLabel("=");
equals.setFont(new Font("Calibri", Font.BOLD, 20));
equals.setForeground(Color.YELLOW);
c.fill = GridBagConstraints.BOTH;
c.weightx = 1;
c.weighty = 0;
c.gridx = 4;
c.gridy = 0;
c.insets = new Insets(0,30,0,0);
centerpanel.add(equals,c);
JLabel total = new JLabel();
total.setText(value100+".00");
total.setFont(new Font("Calibri", Font.BOLD, 20));
total.setForeground(Color.YELLOW);
c.fill = GridBagConstraints.EAST;
c.weightx = 1;
c.weighty = 0;
c.gridx = 5;
c.gridy = 0;
c.insets = new Insets(0,30,0,0);
centerpanel.add(total,c);
//-----------------------------------------------------------------------------------------
JLabel lbl500 = new JLabel("500.00");
lbl500.setFont(new Font("Calibri", Font.BOLD, 20));
lbl500.setForeground(Color.YELLOW);
c.fill = GridBagConstraints.WEST;
c.weightx = 0.5;
c.weighty = 0;
c.gridx = 0;
c.gridy = 1;
c.insets = new Insets(0,30,0,0);
centerpanel.add(lbl500,c);
JLabel multiply_1 = new JLabel("X");
multiply_1.setFont(new Font("Calibri", Font.BOLD, 20));
multiply_1.setForeground(Color.YELLOW);
c.fill = GridBagConstraints.BOTH;
c.weightx = 0.5;
c.weighty = 0;
c.gridx = 1;
c.gridy = 1;
c.insets = new Insets(0,0,0,0);
centerpanel.add(multiply_1,c);
number_1 = new JTextField();
number_1.setText(value500+"");
number_1.setColumns(3);
number_1.setFont(new Font("Calibri", Font.BOLD, 20));
number_1.setForeground(Color.BLACK);
c.fill = GridBagConstraints.BOTH;
c.weightx = 0.5;
c.weighty = 0;
c.gridx = 2;
c.gridy = 1;
c.insets = new Insets(0,0,0,0);
centerpanel.add(number_1,c);
up_1 = new JButton("up");
up_1.setBackground(new Color(224,223,227));
up_1.setPreferredSize(new Dimension(5,15));
up_1.addActionListener(upaction);
down_1 = new JButton("down");
down_1.setBackground(new Color(224,223,227));
down_1.setPreferredSize(new Dimension(5,15));
down_1.setEnabled(false);
down_1.addActionListener(downaction);
JPanel updownpanel_1 = new JPanel();
updownpanel_1.setPreferredSize(new Dimension(10,10));
updownpanel_1.setLayout(new BorderLayout());
updownpanel_1.add(up_1, BorderLayout.NORTH);
updownpanel_1.add(down_1, BorderLayout.SOUTH);
c.fill = GridBagConstraints.BOTH;
c.weightx = 0.5;
c.weighty = 0;
c.gridx = 3;
c.gridy = 1;
c.insets = new Insets(0,0,0,0);
centerpanel.add(updownpanel_1,c);
JLabel equals_1 = new JLabel("=");
equals_1.setFont(new Font("Calibri", Font.BOLD, 20));
equals_1.setForeground(Color.YELLOW);
c.fill = GridBagConstraints.BOTH;
c.weightx = 1;
c.weighty = 0;
c.gridx = 4;
c.gridy = 1;
c.insets = new Insets(0,30,0,0);
centerpanel.add(equals_1,c);
JLabel total_1 = new JLabel();
total_1.setText(value500+".00");
total_1.setFont(new Font("Calibri", Font.BOLD, 20));
total_1.setForeground(Color.YELLOW);
c.fill = GridBagConstraints.EAST;
c.weightx = 1;
c.weighty = 0;
c.gridx = 5;
c.gridy = 1;
c.insets = new Insets(0,30,0,0);
centerpanel.add(total_1,c);
//-----------------------------------------------------------------------------------------
JLabel lbl200 = new JLabel("200.00");
lbl200.setFont(new Font("Calibri", Font.BOLD, 20));
lbl200.setForeground(Color.YELLOW);
c.fill = GridBagConstraints.WEST;
c.weightx = 0.5;
c.weighty = 0;
c.gridx = 0;
c.gridy = 2;
c.insets = new Insets(0,30,0,0);
centerpanel.add(lbl200,c);
JLabel multiply_2 = new JLabel("X");
multiply_2.setFont(new Font("Calibri", Font.BOLD, 20));
multiply_2.setForeground(Color.YELLOW);
c.fill = GridBagConstraints.BOTH;
c.weightx = 0.5;
c.weighty = 0;
c.gridx = 1;
c.gridy = 2;
c.insets = new Insets(0,0,0,0);
centerpanel.add(multiply_2,c);
number_2 = new JTextField();
number_2.setText(value200+"");
number_2.setColumns(3);
number_2.setFont(new Font("Calibri", Font.BOLD, 20));
number_2.setForeground(Color.BLACK);
c.fill = GridBagConstraints.BOTH;
c.weightx = 0.5;
c.weighty = 0;
c.gridx = 2;
c.gridy = 2;
c.insets = new Insets(0,0,0,0);
centerpanel.add(number_2,c);
up_2 = new JButton("up");
up_2.setBackground(new Color(224,223,227));
up_2.setPreferredSize(new Dimension(5,15));
up_2.addActionListener(upaction);
down_2 = new JButton("down");
down_2.setBackground(new Color(224,223,227));
down_2.setPreferredSize(new Dimension(5,15));
down_2.setEnabled(false);
down_2.addActionListener(downaction);
JPanel updownpanel_2 = new JPanel();
updownpanel_2.setPreferredSize(new Dimension(10,10));
updownpanel_2.setLayout(new BorderLayout());
updownpanel_2.add(up_2, BorderLayout.NORTH);
updownpanel_2.add(down_2, BorderLayout.SOUTH);
c.fill = GridBagConstraints.BOTH;
c.weightx = 0.5;
c.weighty = 0;
c.gridx = 3;
c.gridy = 2;
c.insets = new Insets(0,0,0,0);
centerpanel.add(updownpanel_2,c);
JLabel equals_2 = new JLabel("=");
equals_2.setFont(new Font("Calibri", Font.BOLD, 20));
equals_2.setForeground(Color.YELLOW);
c.fill = GridBagConstraints.BOTH;
c.weightx = 1;
c.weighty = 0;
c.gridx = 4;
c.gridy = 2;
c.insets = new Insets(0,30,0,0);
centerpanel.add(equals_2,c);
JLabel total_2 = new JLabel();
total_2.setText(value200+".00");
total_2.setFont(new Font("Calibri", Font.BOLD, 20));
total_2.setForeground(Color.YELLOW);
c.fill = GridBagConstraints.EAST;
c.weightx = 1;
c.weighty = 0;
c.gridx = 5;
c.gridy = 2;
c.insets = new Insets(0,30,0,0);
centerpanel.add(total_2,c);
//-----------------------------------------------------------------------------------------
JLabel lbl100 = new JLabel("100.00");
lbl100.setFont(new Font("Calibri", Font.BOLD, 20));
lbl100.setForeground(Color.YELLOW);
c.fill = GridBagConstraints.WEST;
c.weightx = 0.5;
c.weighty = 0;
c.gridx = 0;
c.gridy = 3;
c.insets = new Insets(0,30,0,0);
centerpanel.add(lbl100,c);
JLabel multiply_3 = new JLabel("X");
multiply_3.setFont(new Font("Calibri", Font.BOLD, 20));
multiply_3.setForeground(Color.YELLOW);
c.fill = GridBagConstraints.BOTH;
c.weightx = 0.5;
c.weighty = 0;
c.gridx = 1;
c.gridy = 3;
c.insets = new Insets(0,0,0,0);
centerpanel.add(multiply_3,c);
number_3 = new JTextField();
number_3.setText(value100+"");
number_3.setColumns(3);
number_3.setFont(new Font("Calibri", Font.BOLD, 20));
number_3.setForeground(Color.BLACK);
c.fill = GridBagConstraints.BOTH;
c.weightx = 0.5;
c.weighty = 0;
c.gridx = 2;
c.gridy = 3;
c.insets = new Insets(0,0,0,0);
centerpanel.add(number_3,c);
up_3 = new JButton("up");
up_3.setBackground(new Color(224,223,227));
up_3.setPreferredSize(new Dimension(5,15));
up_3.addActionListener(upaction);
down_3 = new JButton("down");
down_3.setBackground(new Color(224,223,227));
down_3.setPreferredSize(new Dimension(5,15));
down_3.setEnabled(false);
down_3.addActionListener(downaction);
JPanel updownpanel_3 = new JPanel();
updownpanel_3.setPreferredSize(new Dimension(10,10));
updownpanel_3.setLayout(new BorderLayout());
updownpanel_3.add(up_3, BorderLayout.NORTH);
updownpanel_3.add(down_3, BorderLayout.SOUTH);
c.fill = GridBagConstraints.BOTH;
c.weightx = 0.5;
c.weighty = 0;
c.gridx = 3;
c.gridy = 3;
c.insets = new Insets(0,0,0,0);
centerpanel.add(updownpanel_3,c);
JLabel equals_3 = new JLabel("=");
equals_3.setFont(new Font("Calibri", Font.BOLD, 20));
equals_3.setForeground(Color.YELLOW);
c.fill = GridBagConstraints.BOTH;
c.weightx = 1;
c.weighty = 0;
c.gridx = 4;
c.gridy = 3;
c.insets = new Insets(0,30,0,0);
centerpanel.add(equals_3,c);
JLabel total_3 = new JLabel();
total_3.setText(value100+".00");
total_3.setFont(new Font("Calibri", Font.BOLD, 20));
total_3.setForeground(Color.YELLOW);
c.fill = GridBagConstraints.EAST;
c.weightx = 1;
c.weighty = 0;
c.gridx = 5;
c.gridy = 3;
c.insets = new Insets(0,30,0,0);
centerpanel.add(total_3,c);
JLabel coins = new JLabel("Coins:");
coins.setFont(new Font("Calibri", Font.BOLD, 20));
coins.setForeground(Color.YELLOW);
c.fill = GridBagConstraints.BOTH;
c.weightx = 1;
c.weighty = 0;
c.gridx = 4;
c.gridy = 9;
c.insets = new Insets(0,0,0,0);
centerpanel.add(coins,c);
JTextField txttotal = new JTextField();
txttotal.setText(valuecoins+"");
txttotal.setColumns(6);
txttotal.setFont(new Font("Calibri", Font.BOLD, 20));
txttotal.setForeground(Color.BLACK);
c.fill = GridBagConstraints.EAST;
c.weightx = 1;
c.weighty = 0;
c.gridx = 5;
c.gridy = 9;
c.insets = new Insets(0,0,0,35);
centerpanel.add(txttotal,c);
JLabel divider = new JLabel("---------------------");
divider.setFont(new Font("Calibri", Font.BOLD, 20));
divider.setForeground(Color.GRAY);
c.fill = GridBagConstraints.BOTH;
c.weightx = 1;
c.weighty = 0;
c.gridx = 5;
c.gridy = 10;
c.insets = new Insets(0,0,0,0);
centerpanel.add(divider,c);
JLabel txtCoinTotal = new JLabel();
txtCoinTotal.setText(valuecoins+".00");
txtCoinTotal.setFont(new Font("Calibri", Font.BOLD, 20));
txtCoinTotal.setForeground(Color.YELLOW);
c.fill = GridBagConstraints.EAST;
c.weightx = 1;
c.weighty = 0;
c.gridx = 5;
c.gridy = 11;
c.insets = new Insets(0,0,0,35);
centerpanel.add(txtCoinTotal,c);
Card.add(centerpanel);
}
public static void main(String[] args) {
EventQueue.invokeLater(new Runnable() {
@Override
public void run() {
TestPanel test = new TestPanel();
}
});
}
}
我在这里有4行数字，其中有一个
textfield和一个用于递增的向上和向下按钮。它以我喜欢的方式工作，但是如果您运行该程序并从上到下单击一次向上按钮，则第四行将是2而不是1。即使您仍然添加行，第四行也总是2而不是1。从底部开始单击，第一行将是2。如果不是第四行，则它是第一个获得2的行。我的代码看不到任何问题，但是就是这样。即使我正确输入了代码，第一行的后退按钮也不起作用。我已经检查了我的代码两次以上，但看不到任何能使它如此的东西。 最佳答案
如果我们比较up操作的代码...
if (e.getSource() == up) {
value100++;
if (value100 > 0) {
number.setText(value100 + "");
down.setEnabled(true);
}
}
//...
if (e.getSource() == up_3) {
value100++;
if (value100 > 0) {
number_3.setText(value100 + "");
down_3.setEnabled(true);
}
}
用
down操作的代码if (e.getSource() == down) {
value1000--;
if (value1000 > 0) {
number.setText(value1000 + "");
}
if (value1000 == 0) {
number.setText(value1000 + "");
down.setEnabled(false);
value1000 = 0;
}
}
//...
if (e.getSource() == down_3) {
value100--;
if (value100 > 0) {
number_3.setText(value100 + "");
}
if (value100 == 0) {
number_3.setText(value100 + "");
down_3.setEnabled(false);
value100 = 0;
}
}
我们可以看到差异...
up修改了value100，其中down修改了value1000，但是up_3和down_3修改了value100 ...我有空的时候
这就是您的UI在我的PC上的样子...
现在，我坐在这里挠着脑袋“ ...”
现在，如果用
setSize替换pack（在构造函数的末尾调用），我得到...现在，如果我删除所有
setPreferredSize调用，我会得到...仍然需要一些工作，但效果要好得多（恕我直言）...
看看Should I avoid the use of set(Preferred|Maximum|Minimum)Size methods in Java Swing?可以就此问题做出决定...
哦，我不知道它是否重要，但是您可能想看看How to use spinners
关于java - 如何修复 Action 监听器输出？，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/24993255/