How to hack a Java array

Importjava.util.List; Importjava.util.ArrayList; ImportJava.util.Set; ImportJava.util.HashSet;  Public classLzwcode { Public Static voidmain (String [] args) {TestA (); System.out.println ("===========================");          Testb (); System.out.println ("===========================");      TESTC (); }        //remove duplicate values from the array     Public Static voidTestA () {String [] str= {"Java", "C + +", "Php", "C #", "Python", "C + +", "Java"};  for(String elementa:str) {System.out.print (Elementa+ " "); } List<String> list =NewArraylist<string>();  for(inti=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 (NewSTRING[1]);//returns an array containing the specified type of all objects         for(String elementb:newstr) {System.out.print (Elementb+ " ");      } System.out.println (); }        //Delete One of the elements in an array     Public Static voidTestb () {String [] str= {"Java", "C + +", "Php", "C #", "Python"};  for(String elementa:str) {System.out.print (Elementa+ " "); }          //Remove PHPlist<string> list =NewArraylist<string>();  for(inti=0; i<str.length; i++) {List.add (str[i]); } list.remove (2);//list.remove ("Php")System.out.println (); String[] Newstr= List.toarray (NewSTRING[1]);//returns an array containing the specified type of all objects         for(String elementb:newstr) {System.out.print (Elementb+ " ");      } System.out.println (); }        //add an element to an array     Public Static voidTESTC () {String [] str= {"Java", "C + +", "Php", "C #", "Python"};  for(String elementa:str) {System.out.print (Elementa+ " "); }          //Add Rubylist<string> list =NewArraylist<string>();  for(inti=0; i<str.length; i++) {List.add (str[i]); } list.add (2, "Ruby");//list.add ("Ruby")System.out.println (); String[] Newstr= List.toarray (NewSTRING[1]);//returns an array containing the specified type of all objects         for(String elementb:newstr) {System.out.print (Elementb+ " ");      } System.out.println (); }  } 

How to hack a Java array