Reply to thread

Message

<blockquote data-quote="koondeGoda" data-source="post: 2202755" data-attributes="member: 61636">Here is a code that demos java.util.Vector member methods. To whom intersested in J.&nbsp;__________________________________________________&nbsp;/* &nbsp;* a program demonstrating the operation of vector member functions&nbsp;*/import java.io.*;import java.util.Vector;class testVectors {&nbsp; &nbsp; // main&nbsp; &nbsp; public static void main(String a[]){&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; Vector v1 = new Vector();&nbsp; &nbsp; &nbsp; &nbsp; processVector(v1);&nbsp; &nbsp; }&nbsp; &nbsp; //process the vector (format / display / manipulate)&nbsp; &nbsp; static void processVector(Vector v){&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; //fill the vector&nbsp; &nbsp; &nbsp; &nbsp; for ( int i=0; i &lt; 5 ; i++)&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; v.addElement(new Integer(i));&nbsp; &nbsp; &nbsp; // [0,1,2,3,4]&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; System.out.println(&quot; v = &quot;+v);&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; Integer j = new Integer(3);&nbsp; &nbsp; &nbsp; &nbsp; // returns the occurences of 3 in vector v , and the occurences from index 4&nbsp; &nbsp; &nbsp; &nbsp; System.out.println(v.indexOf(j)+&quot;&nbsp; &quot;+v.indexOf(j,4));&nbsp; &nbsp; &nbsp; &nbsp; // returns whether v contains 3 , and last index of 3&nbsp; &nbsp; &nbsp; &nbsp; System.out.println(v.contains(j)+&quot;&nbsp; &quot;+v.lastIndexOf(j));&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp; &nbsp;&nbsp; // new vector v2&nbsp; &nbsp; &nbsp; &nbsp; Vector v2 = new Vector(3,4);&nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp; //&nbsp; capacity=3 capacity increment=4&nbsp; &nbsp; &nbsp; &nbsp; // fill the vector v2&nbsp; &nbsp; &nbsp; &nbsp; for(int i=4 ; i &lt;8 ; i++)&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; v2.addElement(new Integer(i));&nbsp; &nbsp;&nbsp; // [4,5,6,7,8]&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; // extend the size of the vector to accomodate at least specified objects.&nbsp; &nbsp; &nbsp; &nbsp; v2.ensureCapacity(9); &nbsp; &nbsp; &nbsp; &nbsp;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; Vector v3 = new Vector(2);&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp; // creates a vec capacity of 2&nbsp; &nbsp; &nbsp; &nbsp; v3.setSize(4);&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp; // size = capacity = 4&nbsp; &nbsp;&nbsp; v3 = [null,null,null,null]&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; v3.setElementAt(new Integer(9), 1);&nbsp; &nbsp; // [null,9,null,null]&nbsp; &nbsp; &nbsp; &nbsp; v3.setElementAt(new Integer(3), 3);&nbsp; &nbsp; // [null,9,null,3]&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; // insert a element at given position after shifting elements at positions&nbsp; &nbsp; &nbsp; &nbsp; // following the giben position by one.&nbsp; &nbsp; &nbsp; &nbsp; v3.insertElementAt(v3.elementAt(3),1); // [null ,3,9,null,3]&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; v3.ensureCapacity(9);&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; v3.removeElement(new Integer(9));&nbsp; &nbsp; &nbsp; //&nbsp; [null,3,null,3]&nbsp; &nbsp; &nbsp; &nbsp; v3.removeElementAt( v3.size()- 2);&nbsp; &nbsp;&nbsp; // [null,3,3]&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; System.out.println(&quot;v3 &quot;+v3);&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; //elements() returns an Enumeration obj that enumerates all the &nbsp; &nbsp; &nbsp; &nbsp; // objects in the vector&nbsp; &nbsp; &nbsp; &nbsp; java.util.Enumeration ev = v3.elements();&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; while(ev.hasMoreElements())&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; System.out.println(ev.nextElement()+ &quot;&quot;);&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; System.out.println();&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; v3.removeElementAt(0);&nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp; // [3,3]&nbsp; &nbsp; &nbsp; &nbsp; //add all collection v&nbsp; &nbsp; &nbsp; &nbsp; v3.addAll(v);&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; // [3,3,0,1,2,3,4]&nbsp; &nbsp; &nbsp; &nbsp; // removes the contains of v2&nbsp; &nbsp; &nbsp; &nbsp; v3.removeAll(v2);&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; // [3,3,0,1,2,3]&nbsp; &nbsp; &nbsp; &nbsp; // adds the collection to a specified position&nbsp; &nbsp; &nbsp; &nbsp; v3.addAll(2,v) ;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp; // [3, 3, 0, 1, 2, 3, 4, 0, 1, 2, 3]&nbsp; &nbsp; &nbsp; &nbsp; // removes the objects which are not int the collection specified&nbsp; &nbsp; &nbsp; &nbsp; // in this&nbsp; case objects not in v2 will be removed from v3&nbsp; &nbsp; &nbsp; &nbsp; v3.retainAll(v2);&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; // [4] , intersection(v3,v2)&nbsp; &nbsp; &nbsp; &nbsp; v.subList(1,3).clear();&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; // [0,3,4]&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; Vector v4 = new Vector() , v5 ;&nbsp; &nbsp; &nbsp; &nbsp; v4.addElement( new Node(&quot;Jill&quot;,23));&nbsp; &nbsp; &nbsp; &nbsp; v5 = (Vector)v4.clone();&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp; // v4 = [(&quot;Jill&quot;,23)]&nbsp; &nbsp; &nbsp; &nbsp; ((Node)v4.firstElement()).age = 34;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; // v4 = v5 = [(&quot;Jill&quot;,34)]&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; System.out.println(&quot;v4 &quot;+v4+&quot; \n v5 &quot;+v5);&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; /******************************************************************/&nbsp; &nbsp; &nbsp; &nbsp; /* The method clone() should be used carefully.&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp; */&nbsp; &nbsp; &nbsp; &nbsp; /* It clones the array implementing the vector&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; */&nbsp; &nbsp; &nbsp; &nbsp; /* but not THE OBJECTS OF ARRAY .&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp; */&nbsp; &nbsp; &nbsp; &nbsp; /* after method finished the cloned vector includes references to */&nbsp; &nbsp; &nbsp; &nbsp; /* the same objects as the vector from which it was cloned.&nbsp; &nbsp; &nbsp;&nbsp; */&nbsp; &nbsp; &nbsp; &nbsp; /******************************************************************/&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; }}class Node {&nbsp; &nbsp; String name;&nbsp; &nbsp; int age;&nbsp; &nbsp; &nbsp; &nbsp; Node(String s , int n){&nbsp; &nbsp; &nbsp; &nbsp; this.name=s;&nbsp; &nbsp; &nbsp; &nbsp; this.age=n;&nbsp; &nbsp; }&nbsp; &nbsp; public String toString(){&nbsp; &nbsp; &nbsp; &nbsp; return &quot;(&quot;+this.name+&quot; , &quot;+this.age+&quot;)&quot;;&nbsp; &nbsp; }}</blockquote>

[QUOTE="koondeGoda, post: 2202755, member: 61636"] [B]Here is a code that demos java.util.Vector member methods. [/B] [B]To whom intersested in J.[/B] [B]__________________________________________________[/B] [FONT=Courier New]/* * a program demonstrating the operation of vector member functions */ import java.io.*; import java.util.Vector;[/FONT] [FONT=Courier New]class testVectors { // main public static void main(String a[]){ Vector v1 = new Vector(); processVector(v1); } //process the vector (format / display / manipulate) static void processVector(Vector v){ //fill the vector for ( int i=0; i < 5 ; i++) v.addElement(new Integer(i)); // [0,1,2,3,4] System.out.println(" v = "+v); Integer j = new Integer(3); // returns the occurences of 3 in vector v , and the occurences from index 4 System.out.println(v.indexOf(j)+" "+v.indexOf(j,4)); // returns whether v contains 3 , and last index of 3 System.out.println(v.contains(j)+" "+v.lastIndexOf(j)); [/FONT] [FONT=Courier New] // new vector v2 Vector v2 = new Vector(3,4); // capacity=3 capacity increment=4 // fill the vector v2 for(int i=4 ; i <8 ; i++) v2.addElement(new Integer(i)); // [4,5,6,7,8] // extend the size of the vector to accomodate at least specified objects. v2.ensureCapacity(9); Vector v3 = new Vector(2); // creates a vec capacity of 2 v3.setSize(4); // size = capacity = 4 v3 = [null,null,null,null] v3.setElementAt(new Integer(9), 1); // [null,9,null,null] v3.setElementAt(new Integer(3), 3); // [null,9,null,3] // insert a element at given position after shifting elements at positions // following the giben position by one. v3.insertElementAt(v3.elementAt(3),1); // [null ,3,9,null,3] v3.ensureCapacity(9); v3.removeElement(new Integer(9)); // [null,3,null,3] v3.removeElementAt( v3.size()- 2); // [null,3,3] System.out.println("v3 "+v3); //elements() returns an Enumeration obj that enumerates all the // objects in the vector java.util.Enumeration ev = v3.elements(); while(ev.hasMoreElements()) System.out.println(ev.nextElement()+ ""); System.out.println(); v3.removeElementAt(0); // [3,3] //add all collection v v3.addAll(v); // [3,3,0,1,2,3,4] // removes the contains of v2 v3.removeAll(v2); // [3,3,0,1,2,3] // adds the collection to a specified position v3.addAll(2,v) ; // [3, 3, 0, 1, 2, 3, 4, 0, 1, 2, 3] // removes the objects which are not int the collection specified // in this case objects not in v2 will be removed from v3 v3.retainAll(v2); // [4] , intersection(v3,v2) v.subList(1,3).clear(); // [0,3,4] Vector v4 = new Vector() , v5 ; v4.addElement( new Node("Jill",23)); v5 = (Vector)v4.clone(); // v4 = [("Jill",23)] ((Node)v4.firstElement()).age = 34; // v4 = v5 = [("Jill",34)] System.out.println("v4 "+v4+" \n v5 "+v5); /******************************************************************/ /* The method clone() should be used carefully. */ /* It clones the array implementing the vector */ /* but not THE OBJECTS OF ARRAY . */ /* after method finished the cloned vector includes references to */ /* the same objects as the vector from which it was cloned. */ /******************************************************************/ } }[/FONT] [FONT=Courier New]class Node { String name; int age; Node(String s , int n){ this.name=s; this.age=n; } public String toString(){ return "("+this.name+" , "+this.age+")"; } }[/FONT] [/QUOTE]

Verification

Hata thunen beduwama keeyada? (60 bedeema thuna)

Search

Latest ads

Reply to thread