Top ten methods of Java arrays

Top ten methods of Java arrays
The following are the top 10 methods of the Java array. They are the most popular votes from StackOverflow.

• 0. Declaring an array

  String[] aArray = new String[5];String[] bArray = {"a","b","c", "d", "e"};String[] cArray = new String[]{"a","b","c","d","e"};

• 1. Printing arrays in Java

  int[] intArray = { 1, 2, 3, 4, 5 };String intArrayString = Arrays.toString(intArray);// print directly will print reference valueSystem.out.println(intArray);// [[email protected]System.out.println(intArrayString);// [1, 2, 3, 4, 5]

• 2. Create a ArrayList from the array

  String[] stringArray = { "a", "b", "c", "d", "e" };ArrayList<String> arrayList = new ArrayList<String>(Arrays.asList(stringArray));System.out.println(arrayList);// [a, b, c, d, e]

• 3. Check if the array contains a value

  String[] stringArray = { "a", "b", "c", "d", "e" };boolean b = Arrays.asList(stringArray).contains("a");System.out.println(b);// true

• 4. Connect two arrays

  int[] intArray = { 1, 2, 3, 4, 5 };int[] intArray2 = { 6, 7, 8, 9, 10 };// Apache Commons Lang libraryint[] combinedIntArray = ArrayUtils.addAll(intArray, intArray2);

• 5. Inline declaration of an array

  method(new String[]{"a", "b", "c", "d", "e"});

• 6. Concatenate the elements of the provided array into a single string

  // containing the provided list of elements// Apache common langString j = StringUtils.join(new String[] { "a", "b", "c" }, ", ");System.out.println(j);// a, b, c

• 7. Include the ArrayList in the array

  String[] stringArray = { "a", "b", "c", "d", "e" };ArrayList<String> arrayList = new ArrayList<String>(Arrays.asList(stringArray));String[] stringArr = new String[arrayList.size()];arrayList.toArray(stringArr);for (String s : stringArr)System.out.println(s);

• 8. Converting an array to a collection

  Set<String> set = new HashSet<String>(Arrays.asList(stringArray));System.out.println(set);//[d, e, b, c, a]

• 9. Invert an array

  int[] intArray = { 1, 2, 3, 4, 5 };ArrayUtils.reverse(intArray);System.out.println(Arrays.toString(intArray));//[5, 4, 3, 2, 1]

• 10. Deleting elements of an array

  int[] intArray = { 1, 2, 3, 4, 5 };int[] removed = ArrayUtils.removeElement(intArray, 3);//create a new arraySystem.out.println(Arrays.toString(removed));

• One more-convert int to byte array

  byte[] bytes = ByteBuffer.allocate(4).putInt(8).array();for (byte t : bytes) {   System.out.format("0x%x ", t);}

  Ext.: https://www.programcreek.com/2013/09/top-10-methods-for-java-arrays/

Top ten methods of Java arrays