ActionListener没有响应？
[英]ActionListener not responding?
问题描述
我对Java代码非常陌生，但是在其他任何地方都找不到解决问题的答案。 我有一个带有11个JButton的JFrame，每个JButton都称为.addActionListener（this）;。 方法。 前三个和最后一个像预期的那样响应，但是，JButtons buy4-buy10不会触发ActionEvent。 我已多次阅读代码以消除错别字，并且Eclipse没有显示任何错误，但是按钮仍然无法正常工作。
import java.awt.FlowLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
public class MoneyMaker implements ActionListener {
static JButton exit = new JButton("Exit");
static JButton exitShop = new JButton("Exit Shop");
static JButton buy2 = new JButton("Buy Newspapers - $40");
static JButton buy3 = new JButton("Buy Car Wash - $250");
static JButton buy4 = new JButton("Buy Donut Shop - $500");
static JButton buy5 = new JButton("Buy Pizza Store - $800");
static JButton buy6 = new JButton("Buy Furniture Store - $1000");
static JButton buy7 = new JButton("Buy Car Dealer - $2500");
static JButton buy8 = new JButton("Buy Whole Foods Market - $15000");
static JButton buy9 = new JButton("Buy Silicon Valley - $50000");
static JButton buy10 = new JButton("Buy Oil & Gas Company - $1000000");
static int moneyint = 1;
static JLabel moneyLabel = new JLabel("You have: $" + moneyint);
static String itemBeingSold = "lemonade";
static JButton sellItems = new JButton("Sell Items");
static JButton openShop = new JButton("Upgrade Merchandise");
static JLabel sellLabel = new JLabel("Currently selling: " + itemBeingSold);
static JFrame ClickerFrame = new JFrame("MoneyMaker TM - How Rich Can You Get?");
{
ClickerFrame.setLayout(new FlowLayout());
ClickerFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
ClickerFrame.setSize(475, 150);
ClickerFrame.setLocation(500, 100);
ClickerFrame.add(moneyLabel);
ClickerFrame.add(sellLabel);
ClickerFrame.add(sellItems);
sellItems.addActionListener(this);
ClickerFrame.add(openShop);
openShop.addActionListener(this);
ClickerFrame.add(exit);
exit.addActionListener(this);
ClickerFrame.setResizable(false);
ClickerFrame.setVisible(false);
}
static JFrame shopFrame = new JFrame("The Shop TM - What Can You Buy?");
{
shopFrame.setLayout(new FlowLayout());
shopFrame.setDefaultCloseOperation(JFrame.HIDE_ON_CLOSE);
shopFrame.setSize(400, 250);
shopFrame.setLocation(500, 100);
shopFrame.setAlwaysOnTop(true);
shopFrame.add(buy2);
buy2.addActionListener(this);
shopFrame.add(buy3);
buy3.addActionListener(this);
shopFrame.add(buy4);
buy4.addActionListener(this);
shopFrame.add(buy5);
buy5.addActionListener(this);
shopFrame.add(buy6);
buy6.addActionListener(this);
shopFrame.add(buy7);
buy7.addActionListener(this);
shopFrame.add(buy8);
buy8.addActionListener(this);
shopFrame.add(buy9);
buy9.addActionListener(this);
shopFrame.add(buy10);
buy10.addActionListener(this);
shopFrame.add(exitShop);
exitShop.addActionListener(this);
shopFrame.setResizable(false);
shopFrame.setVisible(false);
}
public static void main(String[] args) {
new MoneyMaker();
}
public MoneyMaker() {
ClickerFrame.setVisible(true);
}
public void actionPerformed(ActionEvent arg0) {
Object control = arg0.getSource();
if (control == sellItems) {
MoneyMakerClass.sell();
moneyLabel.setText("You have: $" + moneyint);
}
if (control == openShop) {
if (itemBeingSold.equals(MoneyMakerClass.item1)) {
} else if (itemBeingSold.equals(MoneyMakerClass.item2)) {
buy2.setEnabled(false);
} else if (itemBeingSold.equals(MoneyMakerClass.item3)) {
buy2.setEnabled(false);
buy3.setEnabled(false);
} else if (itemBeingSold.equals(MoneyMakerClass.item4)) {
buy2.setEnabled(false);
buy3.setEnabled(false);
buy4.setEnabled(false);
} else if (itemBeingSold.equals(MoneyMakerClass.item5)) {
buy2.setEnabled(false);
buy3.setEnabled(false);
buy4.setEnabled(false);
buy5.setEnabled(false);
} else if (itemBeingSold.equals(MoneyMakerClass.item6)) {
buy2.setEnabled(false);
buy3.setEnabled(false);
buy4.setEnabled(false);
buy5.setEnabled(false);
buy6.setEnabled(false);
} else if (itemBeingSold.equals(MoneyMakerClass.item7)) {
buy2.setEnabled(false);
buy3.setEnabled(false);
buy4.setEnabled(false);
buy5.setEnabled(false);
buy6.setEnabled(false);
buy7.setEnabled(false);
} else if (itemBeingSold.equals(MoneyMakerClass.item8)) {
buy2.setEnabled(false);
buy3.setEnabled(false);
buy4.setEnabled(false);
buy5.setEnabled(false);
buy6.setEnabled(false);
buy7.setEnabled(false);
buy8.setEnabled(false);
} else if (itemBeingSold.equals(MoneyMakerClass.item9)) {
buy2.setEnabled(false);
buy3.setEnabled(false);
buy4.setEnabled(false);
buy5.setEnabled(false);
buy6.setEnabled(false);
buy7.setEnabled(false);
buy8.setEnabled(false);
buy9.setEnabled(false);
} else if (itemBeingSold.equals(MoneyMakerClass.item10)) {
buy2.setEnabled(false);
buy3.setEnabled(false);
buy4.setEnabled(false);
buy5.setEnabled(false);
buy6.setEnabled(false);
buy7.setEnabled(false);
buy8.setEnabled(false);
buy9.setEnabled(false);
buy10.setEnabled(false);
}
shopFrame.setVisible(true);
}
if (control == exit) {
System.exit(0);
}
if (control == exitShop) {
shopFrame.setVisible(false);
}
if (control == buy2) {
if (moneyint >= 40) {
moneyint = moneyint - 40;
itemBeingSold = "newspaper";
buy2.setEnabled(false);
JOptionPane.showMessageDialog(shopFrame, "You purchased newspapers!");
sellLabel.setText("Currently selling: " + itemBeingSold);
moneyLabel.setText("You have: $" + moneyint);
shopFrame.setVisible(false);
} else {
JOptionPane.showMessageDialog(shopFrame, "Not enough money!");
}
}
if (control == buy3) {
if (moneyint >= 250) {
moneyint = moneyint - 250;
itemBeingSold = "car washes";
buy3.setEnabled(false);
JOptionPane.showMessageDialog(shopFrame, "You purchased a car wash!");
sellLabel.setText("Currently selling: " + itemBeingSold);
moneyLabel.setText("You have: $" + moneyint);
shopFrame.setVisible(false);
} else {
JOptionPane.showMessageDialog(shopFrame, "Not enough money!");
}
}
if (control == buy4) {
if (moneyint >= 500) {
moneyint = moneyint - 500;
itemBeingSold = "donuts";
buy4.setEnabled(false);
JOptionPane.showMessageDialog(shopFrame, "You purchased a donut shop!");
sellLabel.setText("Currently selling: " + itemBeingSold);
moneyLabel.setText("You have: $" + moneyint);
shopFrame.setVisible(false);
} else {
JOptionPane.showMessageDialog(shopFrame, "Not enough money!");
}
if (control == buy5) {
if (moneyint >= 800) {
moneyint = moneyint - 800;
itemBeingSold = "pizza";
buy5.setEnabled(false);
JOptionPane.showMessageDialog(shopFrame, "You purchased a pizzeria!");
sellLabel.setText("Currently selling: " + itemBeingSold);
moneyLabel.setText("You have: $" + moneyint);
shopFrame.setVisible(false);
} else {
JOptionPane.showMessageDialog(shopFrame, "Not enough money!");
}
}
if (control == buy6) {
if (moneyint >= 1000) {
moneyint = moneyint - 1000;
itemBeingSold = "furniture";
buy6.setEnabled(false);
JOptionPane.showMessageDialog(shopFrame, "You purchased a furniture store!");
sellLabel.setText("Currently selling: " + itemBeingSold);
moneyLabel.setText("You have: $" + moneyint);
shopFrame.setVisible(false);
} else {
JOptionPane.showMessageDialog(shopFrame, "Not enough money!");
}
}
if (control == buy7) {
if (moneyint >= 40) {
moneyint = moneyint - 2500;
itemBeingSold = "cars";
buy7.setEnabled(false);
JOptionPane.showMessageDialog(shopFrame, "You purchased a car dealer!");
sellLabel.setText("Currently selling: " + itemBeingSold);
moneyLabel.setText("You have: $" + moneyint);
shopFrame.setVisible(false);
} else {
JOptionPane.showMessageDialog(shopFrame, "Not enough money!");
}
}
if (control == buy8) {
if (moneyint >= 15000) {
moneyint = moneyint - 15000;
itemBeingSold = "organic foods";
buy8.setEnabled(false);
JOptionPane.showMessageDialog(shopFrame, "You purchased Whole Foods Market!");
sellLabel.setText("Currently selling: " + itemBeingSold);
moneyLabel.setText("You have: $" + moneyint);
shopFrame.setVisible(false);
} else {
JOptionPane.showMessageDialog(shopFrame, "Not enough money!");
}
}
if (control == buy9) {
if (moneyint >= 50000) {
moneyint = moneyint - 50000;
itemBeingSold = "cyber electronics";
buy9.setEnabled(false);
JOptionPane.showMessageDialog(shopFrame, "You purchased Silicon Valley!");
sellLabel.setText("Currently selling: " + itemBeingSold);
moneyLabel.setText("You have: $" + moneyint);
shopFrame.setVisible(false);
} else {
JOptionPane.showMessageDialog(shopFrame, "Not enough money!");
}
}
if (control == buy10) {
if (moneyint >= 1000000) {
moneyint = moneyint - 1000000;
itemBeingSold = "oil & gas";
buy10.setEnabled(false);
JOptionPane.showMessageDialog(shopFrame, "You purchased an oil & gas company!");
sellLabel.setText("Currently selling: " + itemBeingSold);
moneyLabel.setText("You have: $" + moneyint);
shopFrame.setVisible(false);
} else {
JOptionPane.showMessageDialog(shopFrame, "Not enough money!");
}
}
}
}
}
一类：
public class MoneyMakerClass {
static String item1 = "lemonade";
static String item2 = "newspaper";
static String item3 = "car washes";
static String item4 = "donuts";
static String item5 = "pizza";
static String item6 = "furniture";
static String item7 = "cars";
static String item8 = "organic foods";
static String item9 = "cyber electronics";
static String item10 = "oil & gas";
public static void sell() {
if (MoneyMaker.itemBeingSold.equals(item1)) {
MoneyMaker.moneyint = MoneyMaker.moneyint + 1;
} else if (MoneyMaker.itemBeingSold.equals(item2)) {
MoneyMaker.moneyint = MoneyMaker.moneyint + 10;
} else if (MoneyMaker.itemBeingSold.equals(item3)) {
MoneyMaker.moneyint = MoneyMaker.moneyint + 25;
} else if (MoneyMaker.itemBeingSold.equals(item4)) {
MoneyMaker.moneyint = MoneyMaker.moneyint + 40;
} else if (MoneyMaker.itemBeingSold.equals(item5)) {
MoneyMaker.moneyint = MoneyMaker.moneyint + 65;
} else if (MoneyMaker.itemBeingSold.equals(item6)) {
MoneyMaker.moneyint = MoneyMaker.moneyint + 100;
} else if (MoneyMaker.itemBeingSold.equals(item7)) {
MoneyMaker.moneyint = MoneyMaker.moneyint + 550;
} else if (MoneyMaker.itemBeingSold.equals(item8)) {
MoneyMaker.moneyint = MoneyMaker.moneyint + 1000;
} else if (MoneyMaker.itemBeingSold.equals(item9)) {
MoneyMaker.moneyint = MoneyMaker.moneyint + 10000;
} else if (MoneyMaker.itemBeingSold.equals(item10)) {
MoneyMaker.moneyint = MoneyMaker.moneyint + 100000;
}
}
}
任何帮助将不胜感激！
1 个解决方案
解决方案1
1 已采纳 2015-03-03 18:04:41
问题是你
if (control == buy4) {
...
}
错过了右括号。 所以你实际拥有的是
if ( control == buy1 ){
...
}
...
if ( control == buy4 ){
if ( control == buy5 ){
...
}
if ( control == buy6 ){
...
}
}
正确关闭if将解决问题。
除此之外：
JButton的ActionListener正在响应，但代码显然未在执行，但是当我直接调用方法时，它确实在执行。 很奇怪的行为？
[英]JButton's ActionListener is responding yet code is apparently not being executed, but when I call method directly, it is. Very strange behavior?
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