Пишу парсер кода, но возникает ошибка вида, когда я второй раз подряд кликаю по кнопке вызова функции main
Ошибка:
Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException
at TakeTheToken.main(TakeTheToken.java:34)
at Win_Token$2.actionPerformed(Win_Token.java:57)
at javax.swing.AbstractButton.fireActionPerformed(Unknown Source)
at javax.swing.AbstractButton$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)
import java.io.BufferedReader;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
public class TakeTheToken {
public class object {
String token;
int type_token;
}
public String token;
public int type_token;
public TakeTheToken(String token, int type_token) {
this.token = token;
this.type_token = type_token;
}
static TakeTheToken ex[];
public static int count = 0;
public static String main() throws IOException {
String str = Open();
System.out.println(str);
addToken(str);
String s = "";
for (int i = 0; i < count; i++) {// Вывод объекта
s += "\n" + ex[i].token + " " + ex[i].type_token + "\n";
}
return s;
}
public static String Open() throws IOException {
File f = new File("D:\\1.txt");
FileReader fr = null;
try {
fr = new FileReader(f);
} catch (FileNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
@SuppressWarnings("resource")
BufferedReader br = new BufferedReader(fr);
StringBuffer sb = new StringBuffer();
String eachLine = null;
try {
eachLine = br.readLine();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
while (eachLine != null) {
sb.append(eachLine);
sb.append("\n");
try {
eachLine = br.readLine();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
return sb.toString().replaceAll("[\\t]", " ");
}
public static void addToken(String str) { //Разбивает на токены
int c = 0;
ex = new TakeTheToken[str.length()];
char[] type = str.toCharArray();
int i = 0;
String word = "", number = "", charius = "";
while (i < str.length()) {
String typeChar = Character.toString(type[i]);
if (RegExp(typeChar) == 1) {//Если буквы
while (RegExp(typeChar) == 1) {
word += typeChar;
i++;
if (i < str.length()) {
typeChar = String.valueOf(type[i]);
} else break;
}
ex[c] = new TakeTheToken(word, typeToken(word, 1));
c++;
count++;
System.out.print(word);
word = "";
}
if (RegExp(typeChar) == 2) {//Если цифры
while (RegExp(typeChar) == 2) {
number += typeChar;
i++;
if (i < str.length()) {
typeChar = String.valueOf(type[i]);
} else break;
}
ex[c] = new TakeTheToken(number, 3);
c++;
count++;
System.out.print(number);
number = "";
}
if (RegExp(typeChar) == 3) {
if (type[i] == '+') {
while (type[i] == '+') {
charius += typeChar;
if (i+1 < str.length() && type[i+1] == '+') {
i++;
typeChar = String.valueOf(type[i]);
} else break;
}
ex[c] = new TakeTheToken(charius, 4);
c++;
count++;
System.out.print(charius);
charius = "";
}
if (type[i] == '-') {
while (type[i] == '-') {
charius += typeChar;
if (i+1 < str.length() && type[i+1] == '-') {
i++;
typeChar = String.valueOf(type[i]);
} else break;
}
ex[c] = new TakeTheToken(charius, 4);
c++;
count++;
System.out.print(charius);
charius = "";
}
if (type[i] == '"') {
charius += typeChar;
ex[c] = new TakeTheToken(charius, 5);
c++;
count++;
System.out.print(charius);
charius = "";
i++;
typeChar = String.valueOf(type[i]);
while (type[i] != '"') {
if (i+1 < str.length() && type[i] != '"') {
typeChar = String.valueOf(type[i]);
i++;
charius += typeChar;
}
}
ex[c] = new TakeTheToken(charius, 3);
c++;
count++;
System.out.print(charius);
charius = "";
typeChar = String.valueOf(type[i]);
charius += typeChar;
ex[c] = new TakeTheToken(charius, 5);
c++;
count++;
System.out.print(charius);
charius = "";
}
if (type[i] == '\'') {
charius += typeChar;
ex[c] = new TakeTheToken(charius, 5);
c++;
count++;
System.out.print(charius);
charius = "";
i++;
typeChar = String.valueOf(type[i]);
while (type[i] != '\'') {
if (i+1 < str.length() && type[i] != '\'') {
typeChar = String.valueOf(type[i]);
i++;
charius += typeChar;
}
}
ex[c] = new TakeTheToken(charius, 3);
c++;
count++;
System.out.print(charius);
charius = "";
typeChar = String.valueOf(type[i]);
charius += typeChar;
ex[c] = new TakeTheToken(charius, 5);
c++;
count++;
System.out.print(charius);
charius = "";
}
if (type[i] == '!') {
typeChar = String.valueOf(type[i]);
charius += typeChar;
if (type[i+1] == '=') {
i++;
typeChar = String.valueOf(type[i]);
charius += typeChar;
ex[c] = new TakeTheToken(charius, 4);
c++;
count++;
System.out.print(charius);
charius = "";
} else {
ex[c] = new TakeTheToken(charius, 4);
c++;
count++;
System.out.print(charius);
charius = "";
}
}
if (type[i] == '=') {
typeChar = String.valueOf(type[i]);
charius += typeChar;
if (type[i+1] == '=') {
i++;
typeChar = String.valueOf(type[i]);
charius += typeChar;
ex[c] = new TakeTheToken(charius, 4);
c++;
count++;
System.out.print(charius);
charius = "";
} else {
ex[c] = new TakeTheToken(charius, 4);
c++;
count++;
System.out.print(charius);
charius = "";
}
}
if (type[i] == '<') {
typeChar = String.valueOf(type[i]);
charius += typeChar;
if (type[i+1] == '=') {
i++;
typeChar = String.valueOf(type[i]);
charius += typeChar;
ex[c] = new TakeTheToken(charius, 4);
c++;
count++;
System.out.print(charius);
charius = "";
} else {
ex[c] = new TakeTheToken(charius, 4);
c++;
count++;
System.out.print(charius);
charius = "";
}
}
}
}
i++;
}
}
}
