Java array, remove duplicate values, add, delete array elements of the implementation method _java

The

looks like this:

Import java.util.List;
Import java.util.ArrayList;
Import Java.util.Set;
Import Java.util.HashSet;
		public class Lzwcode {public static void main (String [] args) {testa ();
		System.out.println ("===========================");
		Testb ();
		System.out.println ("===========================");
	TESTC ();
		//Remove duplicate values in array public static void Testa () {String [] str = {"Java", "C + +", "Php", "C #", "Python", "C + +", "Java"};
		for (String elementa:str) {System.out.print (Elementa + "");
		} list<string> List = new arraylist<string> ();
			for (int i=0; i<str.length; i++) {if (!list.contains (str[i))) {List.add (str[i]);
		}/* Set<string> Set = new hashset<string> ();
		for (int i=0; i<str.length; i++) {set.add (str[i]); 
		} string[] Newstr = Set.toarray (new string[1));
		* * SYSTEM.OUT.PRINTLN (); string[] Newstr = List.toarray (new string[1)); Returns an array of the specified types containing all objects for (String elementb:newstr) {System.out.print (ELEMENTB +" ");
	} System.out.println ();
		//Delete One of the elements in the array public static void Testb () {String [] str = {"Java", "C + +", "Php", "C #", "Python"};
		for (String elementa:str) {System.out.print (Elementa + "");
		}//delete php list<string> List = new arraylist<string> ();
		for (int i=0; i<str.length; i++) {list.add (str[i]); } list.remove (2);
		List.remove ("Php") System.out.println (); string[] Newstr = List.toarray (new string[1));
		Returns an array of the specified types for all objects (String elementb:newstr) {System.out.print (Elementb + "");
	} System.out.println ();
		Add an element to the array public static void Testc () {String [] str = {"Java", "C + +", "Php", "C #", "Python"};
		for (String elementa:str) {System.out.print (Elementa + "");
		}//Add ruby list<string> List = new arraylist<string> ();
		for (int i=0; i<str.length; i++) {list.add (str[i]); } list.add (2, "Ruby");
		List.add ("Ruby") System.out.println (); string[] Newstr = List.toarray (New STRING[1]);
		Returns an array of the specified types for all objects (String elementb:newstr) {System.out.print (Elementb + "");
	} System.out.println (); }
}

Console results:

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