Splitting String and put it on int array

Question

I have to input a string with numbers ex  1 2 3 4 5  That s a sample of the input  then I have to put that in an array of INT so I can sort it but is not working the way it should work   package array   import java util Scanner   public class Array        public static void main String   args            String input          int length  count  size          Scanner keyboard   new Scanner System in           input   keyboard next            length   input length            size   length   2          int intarray     new int size           String strarray     new String size           strarray   input split                for  count   0  count  lt  intarray length   count                  intarray count    Integer parseInt strarray count                       for  int s   intarray                System out println s

User · Answer

String input    2 1 3 4 5 10 100   String   strings   input split       int   numbers   new int strings length   for  int i   0  i  lt  numbers length  i        numbers i    Integer parseInt strings i      Arrays sort numbers    System out println Arrays toString numbers

User · Answer

List lt String gt  stringList   new ArrayList lt String gt  Arrays asList arr split         List lt Integer gt  intList   new ArrayList lt Integer gt     for  String s   stringList      intList add Integer valueOf s

User · Answer

Let s consider that you have input as  1 2 3 4    That means the length of the input is 7  So now you write the size   7 2   3 5  But as size is an int  it will be rounded off to 3   In short  you are losing 1 value   If you rewrite the code as below it should work   String input  int length  count  size  Scanner keyboard   new Scanner System in   input   keyboard next    length   input length     String strarray     input split       int intarray     new int strarray length    for  count   0  count  lt  intarray length   count          intarray count    Integer parseInt strarray count       for  int s   intarray        System out println s

User · Answer

For input 1 2 3 4 5 the input is of length 9  9 2   4 in integer math  so you re only storing the first four variables  not all 5   Even if you fixed that  it would break horribly if you passed in an input of 10 11 12 13  It would work  by chance  if you used 1 2 3 4 50 for an input  strangely enough  -   You would be much better off doing something like this  String   strArray   input split       int   intArray   new int strArray length   for int i   0  i  lt  strArray length  i          intArray i    Integer parseInt strArray i        For future reference  when you get an error  I highly recommend posting it with the code  You might not have someone with a jdk readily available to compile the code to debug it

User · Answer

You are doing Integer division  so you will lose the correct length if the user happens to put in an odd number of inputs - that is one problem I noticed   Because of this  when I run the code with an input of  1 2 3 4 5 6 7  my last value is ignored

User · Answer

Something like this     public static void main String   args       String N    ABCD      char   array   N toCharArray           and as you can see      System out println array 0        System out println array 1        System out println array 2

User · Answer

Change the order in which you are doing things just a bit   You seem to be dividing by 2 for no particular reason at all    While your application does not guarantee an input string of semi colon delimited variables you could easily make it do so    package com   import java util Scanner   public class Test       public static void main String   args               Good practice to initialize before use         Scanner keyboard   new Scanner System in           String input                  it s also a good idea to prompt the user as to what is going on         keyboardScanner   for                    input   keyboard next                if  input indexOf       gt   0       Realistically we would want to use a regex to ensure  0-9     etc groupings                  break keyboardScanner      break out of the loop               else                    keyboard   new Scanner System in                   continue keyboardScanner     recreate the scanner in the event we have to start over  just some cleanup                                  String strarray     input split          move this up here               int intarray     new int strarray length            int count   0     Declare variables when they are needed not at the top of methods as there is no reason to allocate memory before it is ready to be used         for  count   0  count  lt  intarray length  count                  intarray count    Integer parseInt strarray count                       for  int s   intarray                System out println s

User · Answer

Java 8 offers a streams-based alternative to manual iteration   int   intArray   Arrays stream input split            mapToInt Integer  parseInt       toArray      Be prepared to catch NumberFormatException if it s possible for the input to contain character sequences that cannot be converted to an integer

[java] Splitting String and put it on int array

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