Avoid overwriting text file.

Question

i'm using a rather simple code to write stuff stored in an array to a text file. the only problem is every time i write new stuff to the text file it overwrites the previous file i had how do i stop this from happening.
heres the code:-
public void WriteToFile(){
               // Stream to write file
          FileOutputStream fout1,fout2,fout3,fout4,fout5;          
          try
          fout1 = new FileOutputStream ("ItemName.txt");
          for(int f = 0; f<ItemNo;f++){
          new PrintStream(fout1).println (Item[f]);
               fout1.close();
               fout2 = new FileOutputStream ("ItemQuantity.txt");
               for(int z = 0; z<ItemNo;z++){
          new PrintStream(fout2).println (Quantity[z]);
               fout2.close();
               fout3 = new FileOutputStream ("MaxQuantity.txt");
               for(int w = 0; w<ItemNo;w++){
          new PrintStream(fout3).println (max[w]);
               fout3.close();
               fout4 = new FileOutputStream ("MinQuantity.txt");
               for(int q = 0; q<ItemNo;q++){
          new PrintStream(fout4).println (min[q]);
               fout4.close();     
               fout5 = new FileOutputStream ("Charges.txt");
               for(int q = 0; q<ItemNo;q++){
          new PrintStream(fout5).println (charges[q]);
               fout5.close();     
          // Close our output stream
          // Catches any error conditions
          catch (IOException e)
               System.err.println ("Unable to write to file");
               System.exit(-1);
               }

Answer 1

Your code can be compressed ...
public void WriteToFile(){
// Stream to write file
final String[] NAMES = {
  "ItemName.txt",
  "ItemQuantitiy.txt",
  "MaxQuantity.txt",
  "MinQuantity.txt",
  "Charges.txt"
PrintStream[] outs = new PrintStream[5];
try
  for (int i = 0;i < outs.length;i++) {
    outs[i] = new PrintStream(new FileOutputStream(NAMES, true)); // true is for "append" instead of "overwrite"
for (int i = 0;i < itemNo;i++) {
outs[0].println(Item[i]);
outs[1].println(Quantity[i]);
outs[2].println(max[i]);
outs[3].println(min[i]);
outs[4].println(charges[i]);
catch (IOException ex) {
// Error handling here
finally {
// Close all streams here