Hi, I need help with my java program on arrays I can get number 6 and number 7 t

Question

Hi, I need help with my java program on arrays I can get number 6 and number 7 to print the answer but um retty sure the methods are correct for both of them. I am just unsure on how to set up the statements for them to print.

I keep getting this error: The method copyEvens(int[], int) in the type Arrays is not applicable for the arguments (int[])

This is my java class:

public class Arrays {

   /**
   * @param args
   */
   public static void main(String[] args) {
       int [] a = {1, 2, 3};
       int [] b = {3, 1, 2, 3, 5};
       int [] c = {13, 6, 1, 2, 7};
       int [] d = {1, 2, 3, 4, 5, 6};
       int [] e = { 2, 3, 4, 5, 6, 7};
       int[] ab = {2,5};
       int[] bc = {2, 3, 4};
   int[] cd = {4, 3, 2};
    int[] dc = {3, 4, 5};
       int[] ef = {2, 1, 2, 3, 4};
       String[] fe = {"a", "bb", "b", "ccc"};
       int[] fg = {6, 1, 2, 4, 5, 8};
      
       // #1
      
       boolean ex1 = firstLast3(a);
       boolean ex2 = firstLast3(b);
       boolean ex3 = firstLast3(c);
       System.out.println(ex1);
       System.out.println(ex2);
       System.out.println(ex3);
       //#2
      
       System.out.println("");
       System.out.println("");
       System.out.println("Question number 2 ");
       int ex4 = matchUp(b, c);
       int ex5 = matchUp(d, e);
      
       System.out.println(ex4);
       System.out.println(ex5);
       //#3
       System.out.println("");
       System.out.println("");
       System.out.println("Question number 3 ");

   boolean h = has23(ab);
       System.out.println(h);
       //#4
       System.out.println("");
       System.out.println("");
       System.out.println("Question number 4 ");
          
          
       boolean u = has2And3(dc);
       System.out.println(u);
       //#5
       System.out.println("");
       System.out.println("");
       System.out.println("Question number 5 ");
          
          
       int j = countEvens(ef);
       System.out.println(j);
       //6
         
         
         
       //#7
       System.out.println("");
       System.out.println("");
       System.out.println("Question number 7 ");
         
       int[] l = copyEvens(fg);
       System.out.print(l);
      
   }
      
   public static boolean firstLast3(int[] a ) {
       if (a[0] == 3 || a[a.length - 1] == 3)
           return true;
       else
           return false;
      
       }
  
  
   public static int matchUp( int[] a, int[] b ) {
       int count = 0;
       for ( int i = 0; i < a.length; i++)
           if (a[i] == b[i])
               count++;
       return count;
      
   }
  
   //3
   public static boolean has23(int[] nums)
   {
      if(nums[0] == 2 || nums[0] == 3)
          return true;
      return (nums[1] == 2 || nums[1] == 3);
      
   }
   //4
   public static boolean has2And3(int[] nums)
   {
      if(nums[0] == 2 && nums[0] == 3)
          return true;
      return (nums[1] == 2 && nums[1] == 3);
      
   }
   //5
   public static int countEvens(int[] nums)
   {
      int count = 0;
      for(int i = 0; i < nums.length; i++)
      {
          if(nums[i] % 2 == 0)
              count++;
      }
      return count;
   }
   //6
   public static int wordsCount(String[] words, int length) {
       int counts = 0;
       for (int i = 0; i < words.length; i++) {
       if (words[i].length() == length)
       counts++;
       }
       return counts;
       }
   //7
   public static int[] copyEvens(int[] nums, int count) {
       int a = 0;
       int[] array = new int[count];
       for (int i = 0; i < nums.length; i++) {
       if (nums[i] % 2 == 0) {
       array[a] = nums[i];
       a++;
       }
       if (a == count)
       return array;
       }
       return nums;
       }

     
}

Explanation / Answer

You are calling number 7 method by using below statement

int[] l = copyEvens(fg);

but you should pass second parameter as well which is the count of elements as copyEvens function declaration expects 2 parameters:

public static int[] copyEvens(int[] nums, int count)

passing the second parameter to the function will work.

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