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edit approved Jun 16, 2014 at 18:19
glen3b
edit approved Jun 16, 2014 at 18:19
glen3b
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TOPIC Name: List VS Set

I have just gone through Java's most important topic called Collections Framework. I thought to share my little knowledge about Collections with you. List, Set, Map are the most important topic of it. So let's start with List and Set.

Difference between List and Set:

  1. List is a collection class which extends AbstractList class where as Set is a collection class which extends AbstractSet class but both implements Collection interface.

  2. List interface allows duplicate values (elements) whereas Set interface does not allow duplicate values. In case of duplicate elements in Set, it replaces older values.

  3. List interface allows NULL values where as Set interface does not allow Null values. In case of using Null values in Set it gives NullPointerException.

  4. List interface maintains insertion order. That means the way we add the elements in the List in the same way we obtain it using iterator or for-each style. Whereas Set interface doesSet implementations do not maintainsnecessarily maintain insertion order. Although (Although SortedSet does using TreeSet, and LinkedHashSet maintains insertion order).

  5. List interface has it'sits own methods defined whereas Set interface does not have it'sits own method so Set uses Collection interface methods only.

  6. List interface has one legacy class called VectorVector whereas Set interface does not have any legacy class

  7. Last but not the least... The listIterator() method can only be used to cycle through the elements within List Classes whereas we can use iterator() method to access Set class elements

Anything else can we add? Please let me know.

Thanks.

TOPIC Name: List VS Set

I have just gone through Java's most important topic called Collections Framework. I thought to share my little knowledge about Collections with you. List, Set, Map are the most important topic of it. So let's start with List and Set.

Difference between List and Set:

  1. List is a collection class which extends AbstractList class where as Set is a collection class which extends AbstractSet class but both implements Collection interface.

  2. List interface allows duplicate values (elements) whereas Set interface does not allow duplicate values. In case of duplicate elements in Set, it replaces older values.

  3. List interface allows NULL values where as Set interface does not allow Null values. In case of using Null values in Set it gives NullPointerException.

  4. List interface maintains insertion order. That means the way we add the elements in the List in the same way we obtain it using iterator or for-each style. Whereas Set interface does not maintains insertion order. Although SortedSet does using TreeSet.

  5. List interface has it's own methods defined whereas Set interface does not have it's own method so Set uses Collection interface methods only.

  6. List interface has one legacy class called Vector whereas Set interface does not have any legacy class

  7. Last but not the least... The listIterator() method can only be used to cycle through the elements within List Classes whereas we can use iterator() method to access Set class elements

Anything else can we add? Please let me know.

Thanks.

TOPIC Name: List VS Set

I have just gone through Java's most important topic called Collections Framework. I thought to share my little knowledge about Collections with you. List, Set, Map are the most important topic of it. So let's start with List and Set.

Difference between List and Set:

  1. List is a collection class which extends AbstractList class where as Set is a collection class which extends AbstractSet class but both implements Collection interface.

  2. List interface allows duplicate values (elements) whereas Set interface does not allow duplicate values. In case of duplicate elements in Set, it replaces older values.

  3. List interface allows NULL values where as Set interface does not allow Null values. In case of using Null values in Set it gives NullPointerException.

  4. List interface maintains insertion order. That means the way we add the elements in the List in the same way we obtain it using iterator or for-each style. Whereas Set implementations do not necessarily maintain insertion order. (Although SortedSet does using TreeSet, and LinkedHashSet maintains insertion order).

  5. List interface has its own methods defined whereas Set interface does not have its own method so Set uses Collection interface methods only.

  6. List interface has one legacy class called Vector whereas Set interface does not have any legacy class

  7. Last but not the least... The listIterator() method can only be used to cycle through the elements within List Classes whereas we can use iterator() method to access Set class elements

Anything else can we add? Please let me know.

Thanks.

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Jason Aller
Jason Aller
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TOPIC Name: ListList VS Set I

I have just gone through Java's most important topic called Collections Framework. I thought to share my little knowledge about Collections with you..List List, Set, Map are the most important topic of it. So let's start with List and Set.

Difference between List and Set:

  1. List is a collection class which extends AbstractListAbstractList class where as Set is a collection class which extends AbstractSetAbstractSet class but both implements Collection interface.

  2. List interface allows duplicate values (elements) whereas Set interface does not allow duplicate values. In case of duplicate elements in Set, it replaces older values.

  3. List interface allows NULL values where as Set interface does not allow Null values. In case of using Null values in Set it gives NullPointerExceptionNullPointerException.

  4. List interface maintains insertion order. That means the way we add the elements in the List in the same way we obtain it using iterator or for-each style. Whereas Set interface does not maintains insertion order. Although SortedSetSortedSet does using TreeSetTreeSet.

  5. List interface has it's own methods defined whereas Set interface does not have it's own method so Set uses Collection interface methods only.

  6. List interface has one legacy class called Vector whereas Set interface does not have any legacy class

  7. Last but not the least......listIterator() The listIterator() method can only be used to cycle through the elements within List Classes whereas we can use iterator() method to access Set class elements

Anything else can we add...:)? Please let me know.....:)

Thanks.

TOPIC Name: List VS Set I have just gone through Java's most important topic called Collections Framework. I thought to share my little knowledge about Collections with you..List, Set, Map are the most important topic of it. So let's start with List and Set.

Difference between List and Set:

  1. List is a collection class which extends AbstractList class where as Set is a collection class which extends AbstractSet class but both implements Collection interface.

  2. List interface allows duplicate values (elements) whereas Set interface does not allow duplicate values. In case of duplicate elements in Set, it replaces older values.

  3. List interface allows NULL values where as Set interface does not allow Null values. In case of using Null values in Set it gives NullPointerException.

  4. List interface maintains insertion order. That means the way we add the elements in the List in the same way we obtain it using iterator or for-each style. Whereas Set interface does not maintains insertion order. Although SortedSet does using TreeSet.

  5. List interface has it's own methods defined whereas Set interface does not have it's own method so Set uses Collection interface methods only.

  6. List interface has one legacy class called Vector whereas Set interface does not have any legacy class

  7. Last but not the least......listIterator() method can only be used to cycle through the elements within List Classes whereas we can use iterator() method to access Set class elements

Anything else can we add...:) Please let me know.....:)

Thanks.

TOPIC Name: List VS Set

I have just gone through Java's most important topic called Collections Framework. I thought to share my little knowledge about Collections with you. List, Set, Map are the most important topic of it. So let's start with List and Set.

Difference between List and Set:

  1. List is a collection class which extends AbstractList class where as Set is a collection class which extends AbstractSet class but both implements Collection interface.

  2. List interface allows duplicate values (elements) whereas Set interface does not allow duplicate values. In case of duplicate elements in Set, it replaces older values.

  3. List interface allows NULL values where as Set interface does not allow Null values. In case of using Null values in Set it gives NullPointerException.

  4. List interface maintains insertion order. That means the way we add the elements in the List in the same way we obtain it using iterator or for-each style. Whereas Set interface does not maintains insertion order. Although SortedSet does using TreeSet.

  5. List interface has it's own methods defined whereas Set interface does not have it's own method so Set uses Collection interface methods only.

  6. List interface has one legacy class called Vector whereas Set interface does not have any legacy class

  7. Last but not the least... The listIterator() method can only be used to cycle through the elements within List Classes whereas we can use iterator() method to access Set class elements

Anything else can we add? Please let me know.

Thanks.

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user3542872
user3542872
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TOPIC Name: List VS Set I have just gone through Java's most important topic called Collections Framework. I thought to share my little knowledge about Collections with you..List, Set, Map are the most important topic of it. So let's start with List and Set.

Difference between List and Set:

  1. List is a collection class which extends AbstractList class where as Set is a collection class which extends AbstractSet class but both implements Collection interface.

  2. List interface allows duplicate values (elements) whereas Set interface does not allow duplicate values. In case of duplicate elements in Set, it replaces older values.

  3. List interface allows NULL values where as Set interface does not allow Null values. In case of using Null values in Set it gives NullPointerException.

  4. List interface maintains insertion order. That means the way we add the elements in the List in the same way we obtain it using iterator or for-each style. Whereas Set interface does not maintains insertion order. Although SortedSet does using TreeSet.

  5. List interface has it's own methods defined whereas Set interface does not have it's own method so Set uses Collection interface methods only.

  6. List interface has one legacy class called Vector whereas Set interface does not have any legacy class

  7. Last but not the least......listIterator() method can only be used to cycle through the elements within List Classes whereas we can use iterator() method to access Set class elements

Anything else can we add...:) Please let me know.....:)

Thanks.