我有一个项目可以接受不同数量的输入并显示不同数量的输出。我需要使用动态GUI实现。我已经实现了一些代码如下：
package orderMatcher2;
import java.awt.BorderLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import java.util.Scanner;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
import javax.swing.JTextField;
import javax.swing.ScrollPaneConstants;
public class OrderMatcher2 {
public static Scanner input;
public static String order;
public static List<String> sellOrder = new ArrayList<String>();
public static List<String> buyOrder = new ArrayList<String>();
public static List<Integer> sellVolume = new ArrayList<Integer>(0);
public static List<Integer> sellPrice = new ArrayList<Integer>(0);
public static List<Integer> buyVolume = new ArrayList<Integer>(0);
public static List<Integer> buyPrice = new ArrayList<Integer>(0);
public static int tempDiff;
public static int sellTemp;
public static int buyTemp;
public static int priceSell;
public static int priceBuy;
public static JTextArea incoming;
public static JTextField outgoing;
public OrderMatcher2() {
// TODO Auto-generated constructor stub
}
public static void main(String[] args) {
// TODO Auto-generated method stub
JFrame frame = new JFrame("Enter 'Exit or EXIT or exit' to end");
JPanel mainPanel = new JPanel();
incoming = new JTextArea(15, 50);
incoming.setLineWrap(true);
incoming.setWrapStyleWord(true);
incoming.setEditable(false);
JScrollPane qScroller = new JScrollPane(incoming);
qScroller
.setVerticalScrollBarPolicy(ScrollPaneConstants.VERTICAL_SCROLLBAR_ALWAYS);
qScroller
.setHorizontalScrollBarPolicy(ScrollPaneConstants.HORIZONTAL_SCROLLBAR_NEVER);
outgoing = new JTextField(20);
JButton sendButton = new JButton("Send");
sendButton.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
// TODO Auto-generated method stub
do {
System.out.println("> " + outgoing.getText());
order = outgoing.getText().trim();
// order = input.nextLine();
order = order.toUpperCase();
System.out.println("read " + order);
incoming.append(order + "\n");
if (order.equals("EXIT"))
System.exit(0);
if (!(order.equals("PRINT"))) {
System.out.println(order);
incoming.append(order);
orderOperationValidation(order);
}
if (order.substring(0, 4).equals("SELL")) {
orderOperationSell(order);
}
if (order.substring(0, 3).equals("BUY")) {
orderOperationBuy(order);
}
if (order.contains("PRINT")) {
callPrint();
}
/*
* if (order.equals("PRINT")) callPrint();
*/
outgoing.setText("");
outgoing.requestFocus();
} while ((order.contains("SELL")) || (order.contains("BUY"))
|| (order.contains("PRINT")));
}
});
mainPanel.add(qScroller);
mainPanel.add(outgoing);
mainPanel.add(sendButton);
frame.getContentPane().add(BorderLayout.CENTER, mainPanel);
frame.setSize(450, 350);
frame.setVisible(true);
}
public static void orderOperationValidation(String valid) {
// TODO Auto-generated method stub
String[] tokens = valid.split("[\\s@]", 0);
for (String string : tokens) {
System.out.println(string);
}
if ((Integer.parseInt(tokens[1]) < 0)
|| (Integer.parseInt(tokens[2]) < 0)) {
// System.out.println("Invalid Request");
incoming.append("Invalid Request");
new OrderMatcher2();
OrderMatcher2.main(new String[0]);
}
}
public static void orderOperationSell(String selling) {
// TODO Auto-generated method stub
sellOrder.add(selling);
String[] tempSell = selling.split("[\\s@]", 0);
sellVolume.addAll(new ArrayList<Integer>(Arrays.asList(Integer
.parseInt(tempSell[1]))));
sellPrice.addAll(new ArrayList<Integer>(Arrays.asList(Integer
.parseInt(tempSell[2]))));
for (int i = 0; i < buyPrice.size(); i++) {
for (int j = 0; j < sellPrice.size(); j++) {
if (buyPrice.get(i) >= sellPrice.get(j)) {
tempDiff = buyVolume.get(i) - sellVolume.get(j);
if (tempDiff > 0) {
sellTemp = sellVolume.get(j);
priceSell = sellPrice.get(j);
System.out.println("TRADE " + sellTemp + "@"
+ priceSell);
incoming.append("TRADE " + sellTemp + "@" + priceSell);
} else {
buyTemp = buyVolume.get(i);
priceSell = sellPrice.get(j);
System.out.println("TRADE " + buyTemp + "@"
+ priceSell);
incoming.append("TRADE " + buyTemp + "@" + priceSell);
}
if (tempDiff > 0)
buyVolume.set(i, tempDiff);
}
}
}
}
public static void orderOperationBuy(String buying) {
// TODO Auto-generated method stub
buyOrder.add(buying);
String[] tempBuy = buying.split("[\\s@]", 0);
buyVolume.addAll(new ArrayList<Integer>(Arrays.asList(Integer
.parseInt(tempBuy[1]))));
buyPrice.addAll(new ArrayList<Integer>(Arrays.asList(Integer
.parseInt(tempBuy[2]))));
for (int i = 0; i < buyPrice.size(); i++) {
for (int j = 0; j < sellPrice.size(); j++) {
if (buyPrice.get(i) >= sellPrice.get(j)) {
tempDiff = buyVolume.get(i) - sellVolume.get(j);
if (tempDiff > 0) {
sellTemp = sellVolume.get(j);
priceSell = sellPrice.get(j);
System.out.println("TRADE " + sellTemp + "@"
+ priceSell);
incoming.append("TRADE " + sellTemp + "@" + priceSell);
} else {
buyTemp = buyVolume.get(i);
priceSell = sellPrice.get(j);
System.out.println("TRADE " + buyTemp + "@"
+ priceSell);
incoming.append("TRADE " + buyTemp + "@" + priceSell);
}
if (tempDiff > 0)
buyVolume.set(i, tempDiff);
}
}
}
}
public static void callPrint() {
// TODO Auto-generated method stub
System.out.println(" PRINT ");
for (int i = 0; i < buyVolume.size(); i++) {
if (buyVolume.get(i) != 0) {
if (i <= 0) {
incoming.append("---- BUY ----");
System.out.println("---- BUY ----");
}
buyTemp = buyVolume.get(i);
priceBuy = buyPrice.get(i);
System.out
.println("BUY " + Math.abs(buyTemp) + "@" + priceBuy);
incoming.append("BUY " + Math.abs(buyTemp) + "@" + priceBuy);
} else {
System.out.println("---- BUY ----");
incoming.append("---- BUY ----");
}
}
for (int j = 0; j < sellVolume.size(); j++) {
if (j <= 0) {
incoming.append("---- SELL ----");
System.out.println("---- SELL ----");
}
if (sellVolume.get(j) != 0) {
sellTemp = sellVolume.get(j);
priceSell = sellPrice.get(j);
incoming.append("SELL " + Math.abs(sellTemp) + "@" + priceSell);
System.out.println("SELL " + Math.abs(sellTemp) + "@"
+ priceSell);
} else {
incoming.append("---- SELL ----");
System.out.println("---- SELL ----");
}
}
if ((buyVolume.size() == 0) && (sellVolume.size() == 0)) {
incoming.append("---- SELL ----");
System.out.println("---- SELL ----");
incoming.append("");
System.out.println();
incoming.append("---- BUY ----");
System.out.println("---- BUY ----");
}
}
}
卖出100 @ 10 阅读卖出100 @ 10 出售100 @ 10 卖 100 10
阅读
Exception in thread "AWT-EventQueue-0" java.lang.ArrayIndexOutOfBoundsException: 1
at orderMatcher2.OrderMatcher2.orderOperationValidation(OrderMatcher2.java:122)
at orderMatcher2.OrderMatcher2$1.actionPerformed(OrderMatcher2.java:79)
at javax.swing.AbstractButton.fireActionPerformed(Unknown Source)
at javax.swing.AbstractButton$Handler.actionPerformed(Unknown Source)
at javax.swing.DefaultButtonModel.fireActionPerformed(Unknown Source)
at javax.swing.DefaultButtonModel.setPressed(Unknown Source)
at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(Unknown Source)
at java.awt.Component.processMouseEvent(Unknown Source)
at javax.swing.JComponent.processMouseEvent(Unknown Source)
at java.awt.Component.processEvent(Unknown Source)
at java.awt.Container.processEvent(Unknown Source)
at java.awt.Component.dispatchEventImpl(Unknown Source)
at java.awt.Container.dispatchEventImpl(Unknown Source)
at java.awt.Component.dispatchEvent(Unknown Source)
at java.awt.LightweightDispatcher.retargetMouseEvent(Unknown Source)
at java.awt.LightweightDispatcher.processMouseEvent(Unknown Source)
at java.awt.LightweightDispatcher.dispatchEvent(Unknown Source)
at java.awt.Container.dispatchEventImpl(Unknown Source)
at java.awt.Window.dispatchEventImpl(Unknown Source)
at java.awt.Component.dispatchEvent(Unknown Source)
at java.awt.EventQueue.dispatchEventImpl(Unknown Source)
at java.awt.EventQueue.access$500(Unknown Source)
at java.awt.EventQueue$3.run(Unknown Source)
at java.awt.EventQueue$3.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(Unknown Source)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(Unknown Source)
at java.awt.EventQueue$4.run(Unknown Source)
at java.awt.EventQueue$4.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(Unknown Source)
at java.awt.EventQueue.dispatchEvent(Unknown Source)
at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)
at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
at java.awt.EventDispatchThread.run(Unknown Source)
答案 0 :(得分：0)
您应该确保orderOperationValidation的输入不为空，然后将其拆分。如果您调试代码，您会在某些时候看到您将空字符串传递给orderOperationValidation，如果（（Integer.parseInt（tokens [1]）＆lt; 0） || （Integer.parseInt（tokens [2]）＆lt; 0）将抛出ArrayIndexOutOfBoundsException，因为标记没有2或3个项目。