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Vector

Last Updated : 26 May, 2026

title: Vector in Java

Collections Framework61 words3 headingsTables includedExamples included

title: Vector in Java description: Vector class - thread-safe ArrayList

Thread-safe dynamic array. Legacy class, Java 1.0 se hai.

Create karna

java exampleWoHoTech

Vector<Integer> v = new Vector<>();
Vector<Integer> v2 = new Vector<>(10);     // initial capacity
Vector<Integer> v3 = new Vector<>(10, 5); // capacity, increment

Operations

Vector<String> v = new Vector<>(); v.add("Java"); v.add("Python"); v.addElement("C++"); // Legacy method v.get(0); v.elementAt(0); // Legacy v.size(); v.capacity(); // Current capacity v.remove("Java"); v.removeElement("Python"); // Legacy v.contains("C++"); v.firstElement(); v.lastElement(); // Enumeration (legacy iteration) Enumeration<String> e = v.elements(); while (e.hasMoreElements()) { System.out.println(e.nextElement()); }

Vector vs ArrayList

	Vector	ArrayList
--	--	--
Thread Safe	Yes (synchronized)	No
Performance	Slow	Fast
Growth	Double capacity	50% increase
Legacy	Yes (Java 1.0)	Java 2

Modern code mein ArrayList prefer karo, ya CopyOnWriteArrayList for thread safety.

Exam Focus

Revise definitions, diagrams, examples, and short-answer points for Vector.

Interview Use

Prepare one clear explanation, one practical example, and one common mistake for this Java topic.

Search Terms

java, java programming, core java, java master course, java notes, master, course, collections

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Collections FrameworkArrayListtitle: ArrayList in Java Collections FrameworkLinkedListtitle: LinkedList in Java Collections FrameworkStacktitle: Stack in Java Collections FrameworkJava Collections Frameworktitle: Collections Framework Overview Collections FrameworkCollections Practice Programstitle: Collections Programs Collections FrameworkComparable vs Comparatortitle: Comparable vs Comparator

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