From a quick review of that block : while(a!=0){ … else if(a==2) {d=new User_Interface2(); d.showData();} else if(a==3) {d=new User_Interface2(); d.main();} } You are creating a new instance on each iteration. Create d outside the loop and reuse that instance. d=new User_Interface2(); while(a!=0){ … else if(a==2) { d.showData(); } else if(a==3) { d.main(); } }
static void SaveArray() { ArrayList myArray = new ArrayList(); myArray.Add(“First”); myArray.Add(“Second”); myArray.Add(“Third”); myArray.Add(“and more”); StreamWriter sw= File.CreateText(@”C:\file.txt”); foreach (string item in myArray) { sw.WriteLine(item); } sw.Close(); } and you shouldn’t use arraylist not because its 2013 ,but because arraylist boxing each item in the array, where List store the type also. this cost less in … Read more
You are adding all the integers to the same inner list (the one that you create at the start of your method with the statement List<Integer> l1 = new ArrayList<Integer>();). You should create a new List before adding elements to it: for(int i=1; i<n; i++) { if(S.charAt(i)==S.charAt(i-1)) { count++; } else { i2 = i-1; … Read more