java arrays# code example

Example 1: java array

// ! IMPORTANTE !
// in JAVA an array is not the same as an ArrayList object!!
// 1 - declare, instanciate and populate
int arr[] = { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 }; 
// 2 - declare and instanciate an int array with maxSize
// note: the index goes between 0 and maxSize-1
int newarr[] = new int[maxSize];
// 2.1 - insert the value n on the position pos
newarr[pos] = n; 
// 2.2 - insert values recursively
for (i = 0; i < maxSize; i++) { newarr[i] = arr[i]; }

Example 2: arrays

// Java program to demonstrate working of Arrays.toString() 
import java.io.*; 
import java.util.*; 

class GFG { 
	public static void main(String[] args) 
	{ 
		// Let us create different types of arrays and 
		// print their contents using Arrays.toString() 
		boolean[] boolArr = new boolean[] { true, true, false, true }; 
		byte[] byteArr = new byte[] { 10, 20, 30 }; 
		char[] charArr = new char[] { 'g', 'e', 'e', 'k', 's' }; 
		double[] dblArr = new double[] { 1, 2, 3, 4 }; 
		float[] floatArr = new float[] { 1, 2, 3, 4 }; 
		int[] intArr = new int[] { 1, 2, 3, 4 }; 
		long[] lomgArr = new long[] { 1, 2, 3, 4 }; 
		Object[] objArr = new Object[] { 1, 2, 3, 4 }; 
		short[] shortArr = new short[] { 1, 2, 3, 4 }; 

		System.out.println(Arrays.toString(boolArr)); 
		System.out.println(Arrays.toString(byteArr)); 
		System.out.println(Arrays.toString(charArr)); 
		System.out.println(Arrays.toString(dblArr)); 
		System.out.println(Arrays.toString(floatArr)); 
		System.out.println(Arrays.toString(intArr)); 
		System.out.println(Arrays.toString(lomgArr)); 
		System.out.println(Arrays.toString(objArr)); 
		System.out.println(Arrays.toString(shortArr)); 
	} 
}

Example 3: array

// An array in javascript is basicly a data structure set out like this:
const MyArray = {"Object1", "Object2", "Object3"};