Thread: Java Array Merge Input Beginner Question

Hello guys, i'm a beginner on programming and currently making a program right now that will input 5 integer values for the first array and another 5 values for the second array, then merging a two lists of integers into a single list of integers. Store the merge list into another array in a sorted manner.

Example:
arrayOne = {5, 9, 3, 0, 2} arrayTwo = {7, 1, 8, 6, 4}

mergedArray: 5, 9, 3, 0, 2, 7, 1, 8, 6, 4
sortedArray: 0, 1, 2, 3, 4, 5, 6, 7, 8, 9

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
 
public class arrayMerge {
 
	/**
	 * @param args
	 * @throws IOException 
	 * @throws NumberFormatException 
	 */
 
 
            public static void main (String[] args) throws NumberFormatException, IOException 
 
 
 
            int[] arrayone = new int [4];
	    int[] arraytwo = new int [4];
	    int[] arrayMerge = new int[10];
 
            BufferedReader dataIn = new BufferedReader (new InputStreamReader(System.in));
 
 
	    for (int ctr = 0; ctr < arrayOne.length; ctr++ ){
 
	    System.out.print("Enter 5 Numbers for the first array: ");
 
	    arrayone[] = Integer.parseInt(dataIn.readLine()); // cannot resolve into a type, syntax error.
 
	    System.out.print("array 2 {" + ctr + "}" + " = [" arrayone "]"); //syntax error, operator undefined. 
 
	    } for (int ctr = 0; ctr < arraytwo.length; ctr++) {
 
	    System.out.print("Enter 5 Numbers for the second array: ");
 
	    arraytwo[] = Integer.parseInt(dataIn.readLine()); // cannot resolve into a type, syntax error.
 
	    System.out.print("array 2 {" + ctr + "}" + " = [" arraytwo "]"); //syntax error, operator undefined.
	    } 
 
	    arrayMerge = arrayone + arraytwo;
 
	    System.out.print (arrayMerge);
 
	    }
 
}

To be honest, what makes me confuse is on how to merge them, i tried many simple solutions for this problem that i understand so far and it appears that it didnt work quite well.

it didnt work quite well.

Please post the program's input and output that shows what it did and what didn't work the way you want.

A useful method for debugging with arrays:

System.out.println("an ID "+ java.util.Arrays.toString(theArrayName));

This would be better:

for(int j = arrayOne.length; j < mergedArray.length; j++)
   mergedArray[j] = arrayTwo[j-arrayOne.length]

Don't hard code magic numbers. Use variable values. What if the size of the input arrays changed?