rough draft of an inventory object

Inventory

import java.io.*;

class Inventory{
	static int MAXARRAYSIZE = 100;	// Max. size for arrays
	int[] partNum;
	int[] quantity;
	double[] cost;
	double[] wholesaleCost;
	int[] reorderQuantity;
	String[] description;
	int invCnt;

	//constructor
	public Inventory() throws Exception{
		partNum = new int[MAXARRAYSIZE];
		quantity = new int[MAXARRAYSIZE];
		cost = new double[MAXARRAYSIZE];
		wholesaleCost = new double[MAXARRAYSIZE];
		reorderQuantity = new int[MAXARRAYSIZE];
		description = new String[MAXARRAYSIZE];
		invCnt = 0;
		
		FileReader inputFile = new FileReader("initInv.dat"); // read input file
		BufferedReader indata = new BufferedReader(inputFile);
		String workingLine = "";
		while ((workingLine = indata.readLine()) != null){ // stop when no lines left
			String[] tokens = workingLine.split(" ", 6); // split line into String array
			int pn = Integer.parseInt(tokens[0]);
			int q = Integer.parseInt(tokens[1]);
			double c = Double.parseDouble(tokens[2]); // convert values to proper datatypes
			double wc = Double.parseDouble(tokens[3]);
			int rq = Integer.parseInt(tokens[4]);
			if(pn!=-1)addPart(pn, q, c, wc, rq, tokens[5]); // add part if not last line
		}
		inputFile.close();
		indata.close();
	}
	
	//method to add a new part, cost, and quantity
	public void addPart(int pn, int q, double c, double wc, int rq, String d){
		boolean unique = true;
		for(int i=0;i<invCnt;i++){
			if(partNum[i]==pn) unique = false; // if part num already present, don't add it
		}
		if(unique == true){
			partNum[invCnt]=pn;
			quantity[invCnt]=q;
			cost[invCnt]=c;
			wholesaleCost[invCnt]=wc;
			reorderQuantity[invCnt]=rq;
			description[invCnt]=d;
			invCnt++;
		}
	}
	
	public void setQuantity(int pn, int quant){ //method to set quantity
		for(int i=0;i<invCnt;i++){
			if(partNum[i]==pn) quantity[i]=quant;
		}
	}
	
	public void setCost(int pn, double amnt){ //method to set cost
		for(int i=0;i<invCnt;i++){
			if(partNum[i]==pn) cost[i]=amnt;
		}
	}
	
	public void setWholesale(int pn, double amnt){ //method to set wholesale cost
		for(int i=0;i<invCnt;i++){
			if(partNum[i]==pn) wholesaleCost[i]=amnt;
		}
	}
	
	public void setReorder(int pn, int num){ //method to set reorder quantity
		for(int i=0;i<invCnt;i++){
			if(partNum[i]==pn) reorderQuantity[i]=num;
		}
	}
	
	public void setDescription(int pn, String str){ //method to set description
		for(int i=0;i<invCnt;i++){
			if(partNum[i]==pn) description[i]=str;
		}
	}
	
	//method to return the quantity of part 'pn' in stock
	public int getQuantity(int pn){
		for(int i=0;i<invCnt;i++){
			if(partNum[i]==pn) return quantity[i];
		}
		return -1;	// failure to find part
	}
	
	//method to return the cost of part 'pn'
	public double getCost(int pn){
		for(int i=0;i<invCnt;i++){
			if(partNum[i]==pn) return cost[i];
		}
		return -0.001;	// failure to find part
	}
	
	//method to return the wholesale cost of part 'pn'
	public double getWholesale(int pn){
		for(int i=0;i<invCnt;i++){
			if(partNum[i]==pn) return wholesaleCost[i];
		}
		return -0.001;	// failure to find part
	}
	
	//method to return the reorder quantity of part 'pn'
	public int getReorder(int pn){
		for(int i=0;i<invCnt;i++){
			if(partNum[i]==pn) return reorderQuantity[i];
		}
		return -1;	// failure to find part
	}
	
	//method to return the description of part 'pn'
	public String getDescription(int pn){
		for(int i=0;i<invCnt;i++){
			if(partNum[i]==pn) return description[i];
		}
		return "404_PART_NOT_FOUND";	// failure to find part
	}
	
	//finalizer
	public void finalize() throws Exception{
		FileWriter outFile = new FileWriter("finalInv.dat", true); // write output file
		PrintWriter fileOutput = new PrintWriter(outFile,true);
		for(int i=0;i<invCnt;i++){
			fileOutput.println(partNum[i] + " " + quantity[i] + " " + cost[i] + " " + wholesaleCost[i] + " " + reorderQuantity[i] + " " + description[i]);
		}
		fileOutput.println("-1 0 0.0 0.0 0 0");
		fileOutput.close();
		outFile.close();
	}
}