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Thread: Program of an Array in Java

  1. #1
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    Default Program of an Array in Java

    import java.io.*;
     
    public class ArayKo{
      public static void main(String[] args) throws IOException{
        BufferedReader in = new BufferedReader(new InputStreamReader(System.in));
        System.out.print("How many elements you want to enter in the array: ");
        int num=0;
     
        try{
          num = Integer.parseInt(in.readLine());
        }
        catch(NumberFormatException ne){
          System.out.println(ne.getMessage() + " is not a number!");
          System.exit(0);
        }

    Hi, im new to this language and need help how to produce this output

    Enter number of Arrays:
    Num[0]:__
    Num[1]:__

    Where number of arrays will depend on user input on screen and will print it in ascending, descending order and will show the highest and lowest input in the array! Please lighten up...thanks !


  2. #2
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    Default Re: Array

    Hello eric and welcome to the Java Programming Forums.

    You can use this code below. I have used the Scanner class to take user input from the console.
    This will then set the size of the array depending on what int value the user enters:

    import java.util.Scanner;
     
    public class Eric {
     
        public static void main(String[] args) {
     
              System.out.println("Enter Array size: ");
              Scanner sc = new Scanner(System.in);
     
              int arraySize = sc.nextInt();
     
              String[] myArray = new String[arraySize];
     
        }
     
    }
    To take this one step further, ive added this code so the user can now populate each array field and once its filled it will print its results:

    import java.util.Scanner;
     
    public class Eric {
     
        public static void main(String[] args) {
     
              System.out.println("Enter Array size: ");
              Scanner sc = new Scanner(System.in);
     
              int arraySize = sc.nextInt();
     
              String[] myArray = new String[arraySize];
     
              System.out.println("Array size set to " + arraySize);
     
              //Populate the array
              for(int a = 0; a < myArray.length; a++){
                  System.out.println("Enter Array value [" + a + "]:");
                  myArray[a] = sc.next();
              }
     
              //Print array values. Can also add Array sort code here.
              for(int b = 0; b < myArray.length; b++){
                  System.out.println(myArray[b]);
              }
     
        }
     
    }
    To sort the Array you could use the java.util.Arrays class:

    http://www.javaprogrammingforums.com...ays-class.html

    Let me know if you get stuck..
    Please use [highlight=Java] code [/highlight] tags when posting your code.
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