Question:Write a program in java to delete all duplicate digits from an input number? Eg: if input is 112354 then output will be 12354 Answer : import java.util.*; public class duplicate { public static void main(String args[]) { long n; int i=0,l=0,k=0; Scanner sc=new Scanner(System.in); System.out.println("Enter the number:"); n=sc.nextLong(); String s=Long.toString(n); char c[]=new char[s.length()]; ArrayList cc=new ArrayList(); String temp = Long.toString(n); int[] arr = new int[temp.length()]; for (int m = 0; m< temp.length(); m++) { arr[m] = temp.charAt(m) - '0'; } for(i=0;i<s.length();i++) { for(int j=0;j<s.length();j++) { if(arr[i]==arr[j]&&i!=j) { l=1; } } if(l==0) { cc.add(arr[i]); k++; } l=0; } Iterator itr=cc.iterator(); while(itr.hasNext()) { Object ans=itr.next(); System.out.print(ans); } } } Posted By:Tanuj Kumar On:Shareyourconscience