shxrox
commented
3 weeks ago Import Statements: The import statements are incomplete. You should import the necessary.
Regular Expression Issue: The regular expression used in tt.matches("\d") is incorrect for checking digits. You need to escape the backslash in Java strings, so it should be: tt.matches("\d")
import java.util.; import java.io.; public class Pass1 { static int address = 0; static int sadd[] = new int[10]; static int ladd[] = new int[10]; public static void main(String args[]) { BufferedReader br; OutputStream oo; String input = null; String IS[] = {"ADD", "SUB", "MUL", "MOV"}; String UserReg[] = {"AREG", "BREG", "CREG", "DREG"}; String AD[] = {"START", "END"}; String DL[] = {"DC", "DS"}; int lc = 0; int scount = 0, lcount = 0; int flag = 0, flag2 = 0, stored = 0; String tokens[] = new String[30]; String tt = null; String sv[] = new String[10]; String lv[] = new String[10]; try { br = new BufferedReader(new FileReader("initial.txt")); File f = new File("IM.txt"); File f1 = new File("ST.txt"); File f2 = new File("LT.txt"); PrintWriter p = new PrintWriter(f); PrintWriter p1 = new PrintWriter(f1); PrintWriter p2 = new PrintWriter(f2); int k = 0, l = 0; while ((input = br.readLine()) != null) { StringTokenizer st = new StringTokenizer(input, " "); while (st.hasMoreTokens()) { tt = st.nextToken(); if (tt.matches("\d*") && tt.length() > 2) { lc = Integer.parseInt(tt); p.println(lc); address = lc - 1; } else { for (int i = 0; i < AD.length; i++) { if (tt.equals(AD[i])) { p.print("AD " + (i + 1) + " "); } } for (int i = 0; i < IS.length; i++) { if (tt.equals(IS[i])) { p.print("IS " + (i + 1) + " "); } } for (int i = 0; i < UserReg.length; i++) { if (tt.equals(UserReg[i])) { p.print((i + 1) + " "); flag = 1; } } for (int i = 0; i < DL.length; i++) { if (tt.equals(DL[i])) { p.print("DL " + (i + 1) + " "); } } if (tt.length() == 1 && !st.hasMoreTokens() && flag == 1) { if (Arrays.asList(sv).contains(tt)) { for (int i = 0; i < scount; i++) { if (sv[i].equals(tt)) { p.print("S" + i); flag2 = 1; } else { flag2 = 0; } } } else { p.print("S" + scount); sv[scount] = tt; flag2 = 1; scount++; } } if (tt.length() == 1 && st.hasMoreTokens()) { p.print(tt + " "); sadd[k] = address; k++; } if (tt.charAt(0) == '=') { p.print("L" + lcount); lv[lcount] = tt; lcount++; } if (!st.hasMoreTokens()) { p.println(); } if (tt.equals("DS")) { int a = Integer.parseInt(st.nextToken()); address = address + a - 1; p.println(); } } } address++; } p.close(); address--; for (int i = 0; i < lcount; i++) { ladd[i] = address; address++; } for (int i = 0; i < scount; i++) { p1.println(i + "\t" + sv[i] + "\t" + sadd[i]); } p1.close(); for (int i = 0; i < lcount; i++) { p2.println(i + "\t" + lv[i] + "\t" + ladd[i]); } p2.close(); } catch (Exception e) { e.printStackTrace(); } } }