ctest.java

a Java program that reads a file containing instructions written in self-defined file (TPL in this c

import java.io.*;
import java.util.*;


public class cw3c
{
	static String fname;
	static String line;
	
	//print method output line with print or println reserved words
	public static void print(String fname)
	{
		int count=0;
		
		
		try{
				//read in file while there is end statement
				//output stop when encount end reserved word
				BufferedReader inFile=new BufferedReader(new FileReader(fname));
				String nline;	
					
				while((nline=inFile.readLine())!=null&&(nline.equalsIgnoreCase("end"))!=true)	
				{
					//initialise StringTokenizer 		    
					StringTokenizer nfile=new StringTokenizer(nline);
					//seperate line with single word from others
					if(nfile.countTokens()>1)
						{
							    									
							int x=nline.indexOf(" ");			//get index of first space
							String fStr=nline.substring(0,x);	//get reserved words
							String sStr=nline.substring((x+1),nline.length());	//left of line
							//if-else for search print/println reserved words 
							//excute print/println statement
							if((fStr.equals("#"))==true)
							{
								System.out.println(sStr);
								count++;
							}
							else if((fStr.equalsIgnoreCase("println"))==true)
							{	
								System.out.println(sStr);
								count++;
							}
							else if((fStr.equalsIgnoreCase("print"))==true)
							{
								System.out.println(sStr);
								count++;
							}
							else
								System.out.print("");
							
							
						} 
					//search for line with single word of println 
					else
					{
						if((nline.equalsIgnoreCase("println"))==true)
							System.out.println(" ");
						else
							System.out.print("");												
					}
					
				}
			}catch(IOException e){
					System.out.println("an error ["+e+"]");
			}
			
		//output final statement and count the number of line printed	
		System.out.println("TPL Finished ok ["+(count+1)+" lines processed]");
		
	}
	
	//exit method for stop application when no end statement
	public static void exit()
	{
		System.out.println("no end Statement");
		System.exit(0);
	}
	
	public static void main(String args[])
	{	
		//initialise x value as false
		boolean x=false;
		boolean y;
		if(args.length>=1)
		
		{	
			try{
					BufferedReader inFile=new BufferedReader(new FileReader(args[0]));
					
					for(int i=0;i<args.length;i++)			//use for loop get file name
						fname=args[i];
					//use while loop search for end statement
					//get x final value	
					while((line=inFile.readLine())!=null)	
					 {
					 	//y value changes according to line content
					 	y=line.equalsIgnoreCase("end");
					 	//final y value depends on last line
					 	//if end exits, y equals to true
					 	if( y==true)
					 	{
					 		x=y;						//x equals to true, end exits
					 		print(fname);				//invoke print method
					 	}
					 }
					 if(x==false)
					 exit();							//x equals to false, invoke exit method
					 
				}catch(IOException e){
					System.out.println("an error ["+e+"]");
				}
		}
	
		
	}
		
				
}