Problem

Write a program with 3 separate methods. One method will create an integer array, it will take an integer parameter as the size of the array to create and return the newly created array. Second method will take an integer array and add the contents of it and return the total. Third method will take an array set all the value in the array to 0 and will not return the array back.

Introducing Arrays

Solution

First step is to create skeleton structure of the program. The methods will looks something like this:

public static int[] createArray(int n){
}
public static int addArray(int[] array){
}
public static void setZeroes(int[] array){
}

Code

Solution Code

public class PassingArrays{
  public static void main(){
    int[] intArray;
 
    intArray = createArray(10);
    System.out.println(addArray(intArray));
    setZeroes(intArray);
    System.out.println(addArray(intArray));

    System.out.println("Program completed successfully.");
  }
 
  public static int[] createArray(int n){
    int[] array = new int[n];
    
    for(int i=0; i<n; i++)
      array[i] = i;

    return array;
  }  

  public static int addArray(int[] array){
    int total = 0;

    for(int i=0; i<array.length; i++)
      total += array[i];

    return total;
  }

  public static void setZeroes(int[] array){
    for(int i=0; i<array.length; i++)
      array[i] = 0;
  }
}

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Passing Arrays

Problem

Introducing Arrays

Solution

Code

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