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18 Ιουν 2024 · The java.util.vector.equals(Object obj) method of Vector class in Java is used verify the equality of an Object with a vector and compare them. The list returns true only if both Vector contains same elements with same order.
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- Java.Util Package
Here is how we can create vectors in Java. Vector<Type> vector = new Vector<>(); Here, Type indicates the type of a linked list. For example, // create Integer type linked list. Vector<Integer> vector= new Vector<>(); // create String type linked list. Vector<String> vector= new Vector<>();
Java offers a Vector class to provide: Dynamic size . expands or shrinks automatically. Generic . allows any reference data types. Useful predefined methods .
The java.util.Vector class implements a growable array of objects. Similar to an Array, it contains components that can be accessed using an integer index. Following are the important points about Vector: The size of a Vector can grow or shrink as needed to accommodate adding and removing items.
Hashtable of Vectors Example. // Store Strings for the key and Vectors of // Strings for the values. Hashtable<String,Vector<String>> ht = new Hashtable<String,Vector<String>>(); // Look up a key in the hashtable. String key = "CO"; Vector<String> cities = ht.get(key); if (cities == null)
V. Vector Functions. 1) add Inserts the specified element at the specified position in this Vector. add function also use for insert collection or object. Syntax: <object>.add(index,<value>); Eg: v.add ~2, _abc _ ; Note: • add function use index position less than or equal vector size.
Vector proves to be very useful if you don't know the size of the array in advance or you just need one that can change sizes over the lifetime of a program. Below given are the list of constructors provided by the vector class.
