Code meaning

[pariforum]

In the following code,please explain Iterator it=t.iterator(); and Object o=it.next();.

import java.util.*;
class TreeSetDemo{
public static void main(String args[]){
TreeSet t=new TreeSet();
t.add("hello");
t.add("a");
t.add("hi");
t.add("b");
System.out.println(t);
Iterator it=t.iterator();
while(it.hasNext()){
Object o=it.next();
if(o.equals("hi"))
it.remove();
}
System.out.println(t);
}}

[ashsa]

import java.util.*;
class TreeSetDemo{
public static void main(String args[]){
TreeSet t=new TreeSet();
t.add("hello");
t.add("a");
t.add("hi");
t.add("b");
System.out.println(t);
Iterator it=t.iterator(); // iterator() method in TreeSet class returns an Iterator
while(it.hasNext()){ // instance which can be used to iterate through all the
Object o=it.next(); // elements of the TreeSet. next() method of the Iterator
if(o.equals("hi")) // class returns the next element in the TreeSet as an
it.remove(); // Object. Important to note is that the iterator initially point
} // to the position -1 th position of the tree. so hasNext()
System.out.println(t);// will return true if there is an element in the zeroth place.
}}[/quote]

Hope thats clear !! Na ?

[r035198x]

In the following code,please explain Iterator it=t.iterator(); and Object o=it.next();.

import java.util.*;
class TreeSetDemo{
public static void main(String args[]){
TreeSet t=new TreeSet();
t.add("hello");
t.add("a");
t.add("hi");
t.add("b");
System.out.println(t);
Iterator it=t.iterator();
while(it.hasNext()){
Object o=it.next();
if(o.equals("hi"))
it.remove();
}
System.out.println(t);
}}

1.) Use code tags when posting code.
2.)What do you think the lines mean first.

[hirak1984]

iterator iterates over objects in the List.Go through any standard book on java, in the collections chapter you will learn more about iterator.

Btw are you sure this code runs?

In the following code,please explain Iterator it=t.iterator(); and Object o=it.next();.

import java.util.*;
class TreeSetDemo{
public static void main(String args[]){
TreeSet t=new TreeSet();
t.add("hello");
t.add("a");
t.add("hi");
t.add("b");
System.out.println(t);
Iterator it=t.iterator();
while(it.hasNext()){
Object o=it.next();
if(o.equals("hi"))
it.remove();
}
System.out.println(t);
}}

[pariforum]

Thanks a lot. I have one doubt.
t.add("hello");
t.add("a");
In this is element object ?.How is this possible without new key word.Pls reply me.

import java.util.*;
class TreeSetDemo{
public static void main(String args[]){
TreeSet t=new TreeSet();
t.add("hello");
t.add("a");
t.add("hi");
t.add("b");
System.out.println(t);
Iterator it=t.iterator(); // iterator() method in TreeSet class returns an Iterator
while(it.hasNext()){ // instance which can be used to iterate through all the
Object o=it.next(); // elements of the TreeSet. next() method of the Iterator
if(o.equals("hi")) // class returns the next element in the TreeSet as an
it.remove(); // Object. Important to note is that the iterator initially point
} // to the position -1 th position of the tree. so hasNext()
System.out.println(t);// will return true if there is an element in the zeroth place.
}}

Hope thats clear !! Na ?[/quote]

[hirak1984]

You need not need new keywird for that...
But I cud have helped you more precisely if you would have included the class Treeset in your code.
Can you?

Thanks a lot. I have one doubt.
t.add("hello");
t.add("a");
In this is element object ?.How is this possible without new key word.Pls reply me.




Hope thats clear !! Na ?

[/quote]