//////////////I N V E N T O R Y C O N T R O L S Y S T E M////////////////

import java.io.*; import java.lang.*;

class store
{
private InputStreamReader ir=new InputStreamReader(System.in); private BufferedReader br; private FileOutputStream fos; private PrintStream ps; private FileReader frs; //function to check the existence for a file private boolean checkFile(String filename) { File myFile=new File(filename); boolean b=myFile.exists(); return b; } //function for auto-generating the product id private String generate_id() { String id=" "; String thisLine; String[] fullText = new String[200]; String[] lastLine=new String[5]; int counter=0,nid=0,l=0,z=0; boolean b=checkFile("Item.txt"); if(b==false) { id="00001"; } else { try { frs=new FileReader("Item.txt"); br=new BufferedReader(frs); while((thisLine=br.readLine()) != null) { counter=counter+1; fullText[counter] = thisLine; } frs.close(); lastLine=fullText[counter].split(","); nid=Integer.parseInt(lastLine[0]); nid=nid+1; l=(String.valueOf(nid)).length(); z=5-l; for(int i=1;i<=z;i++) { id=id+"0"; } id=id+String.valueOf(nid); id=id.substring(1); } catch(Exception ex) { System.out.println("Could not generate the Item ID...!"); } } return id; } //function to add new product private void addItem() { String desc; String id; double price=0; int stock=0,rol=0; try { id=generate_id(); System.out.print("\n Product ID :"+id+"\n"); br=new BufferedReader(ir); System.out.print("\n Product Description :"); desc=br.readLine(); System.out.print("\n Unit Price : Rs."); price=Double.parseDouble(br.readLine()); System.out.print("\n Starting stock value :"); stock=Integer.parseInt(br.readLine()); System.out.print("\n Re-order Level :"); rol=Integer.parseInt(br.readLine()); fos=new FileOutputStream("Item.txt",true); ps=new PrintStream(fos); ps.println(id+","+desc+","+price+","+stock+","+rol); fos.close(); System.out.println("Successfully added one product..."); } catch(Exception ex) { System.out.println("Error in accepting item specifications..."); } } //function to make selling transaction for a specific product private void makeTransaction() { String id,desc,s="y"; String msg,stock; String value[]=new String[5]; double price=0,amount=0; int qty=0; try { while(s.equals("y")) { br=new BufferedReader(ir); System.out.print("\n Enter Product ID :"); id=br.readLine(); msg=findProduct(id); if(msg.equals("Product not found...")) { System.out.print("\n"+msg); continue; } br=new BufferedReader(ir); value=msg.split(","); if(Integer.parseInt(value[3])==Integer.parseInt(value[4])) { System.out.println("Product in Re-Order Level."); System.out.println("Need to generate a purchase order..."); continue; } desc=value[1]; price=Double.parseDouble(value[2]); stock=value[3]; if(Integer.parseInt(stock)==0) { System.out.println("Current stock is NIL..."); System.out.println("Could not process any transaction on this product..."); continue; } System.out.print("\n Qty to sold :"); qty=Integer.parseInt(br.readLine()); if(qty>Integer.parseInt(stock)) { System.out.println("Out of stock...!"); System.out.println("Could not sell out this product..."); continue; } amount=qty*price; int d=updateStock(id,qty); if(d==1) { System.out.println("Failed to update the stock...!"); } frs=new FileReader("Item.txt"); br=new BufferedReader(frs); while((msg=br.readLine()) != null) { value=msg.split(","); if(value[0].equals(id)) { stock=value[3]; break; } } fos=new FileOutputStream("Transaction.txt",true); ps=new PrintStream(fos); ps.println(id+","+desc+","+qty+","+amount+","+stock); fos.close(); s="n"; } System.out.println("Transaction processed successfully..."); } catch(Exception ex) { System.out.println("Could not process the transaction...!"); } } //function for searching a product in the master file private String findProduct(String pID) throws IOException { int counter=0,i=0,flag=0; String s; String cline[]=new String[255]; String cID[]=new String[5]; String value=" "; frs=new FileReader("Item.txt"); br=new BufferedReader(frs); try { while((s=br.readLine()) != null) { counter=counter+1; cline[counter]=s; cID=cline[counter].split(","); if(cID[0].equals(pID)) { for(;i<cID.length;i++) { value=value+","+cID[i]; } flag=1; break; } } switch(flag) { case 0: value="Product not found..."; break; case 1: value=value.substring(2); break; } } catch(Exception ex) { System.out.println("Could continue operation on searching the product...!"); } return value; } //function for updating the value of current stock whenever a specific item is sold out private int updateStock(String pID,int qty) throws IOException { int counter=0,i=0,pos=0; String s; String cline[]=new String[255]; String cID[]=new String[5]; String row[]=new String[5]; String desc,price,rol; int stock=0,status=0; try { frs=new FileReader("Item.txt"); br=new BufferedReader(frs); while((s=br.readLine()) != null) { counter=counter+1; cline[counter]=s; cID=s.split(","); if(cID[0].equals(pID)) { pos=counter; row=s.split(","); } } fos=new FileOutputStream("Item.txt",false); ps=new PrintStream(fos); for(i=0;i<cline.length;i++) { if(i==pos) { desc=row[1]; price=row[2]; stock=Integer.parseInt(row[3])-qty; rol=row[4]; ps.println(pID+","+desc+","+price+","+stock+","+rol); } else { if(cline[i]!=null) { ps.println(cline[i]); } } } fos.close(); status=0; } catch(Exception ex) { status=1; } return status; } //function to generate and print the daily transaction report private void displayReport() { String id,desc,qty,value,stock,s; String cline[]=new String[5]; try { frs=new FileReader("Transaction.txt"); br=new BufferedReader(frs); System.out.println("\nID Description Qty Sold Amount C.Stock"); System.out.println("----------------------------------------------"); while((s=br.readLine()) != null) { cline=s.split(","); id=cline[0]; desc=cline[1]; qty=cline[2]; value=cline[3]; stock=cline[4]; System.out.println(id+" "+desc+" "+qty+" "+"Rs."+value+" "+stock); } } catch(Exception ex) { System.out.println("Some exceptions occured..."); System.out.println("Could not generate the daily transaction report...!"); } } public static void main(String args[]) throws IOException { store inv=new store(); int ch=0; String s; InputStreamReader ir=new InputStreamReader(System.in); BufferedReader br=new BufferedReader(ir); System.out.println("S T O C K M A N A G E M E N T S Y S T E M"); System.out.println("-----------------------------------------------"); System.out.println("1. ADD NEW PRODUCT"); System.out.println("2. SELL PRODUCT"); System.out.println("3. VIEW DAILY TRANSACTION REPORT"); System.out.println("---------------------------------"); System.out.println("4. Exit"); begin: while(ch!=4) { System.out.print("\n"); System.out.print("\n Enter a choice and Press ENTER to continue[1-4]:"); ch=Integer.parseInt(br.readLine()); if(ch>4||ch<1) { System.out.println("This doesn't appear to be a valid option...!"); continue begin; } if(ch==1) { s="y"; while(s.equals("y")||s.equals("Y")) { inv.addItem(); System.out.print("\n Add another[y/n]:"); s=br.readLine(); } continue begin; } else if(ch==2) { s="y"; while(s.equals("y")||s.equals("Y")) { inv.makeTransaction(); System.out.print("\n Sell another[y/n]:"); s=br.readLine(); } } else if(ch==3) { inv.displayReport(); } } System.out.println("Thanks for using this program...!"); }
}