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The lastElement() method is used to return the last component of the vector.Exampleimport java.util.Vector; public class VectorDemo { public static void main(String[] args) { Vector vec = new Vector(4); vec.add(4); vec.add(3); vec.add(2); vec.add(1); System.out.println("Last element: "+vec.lastElement()); } }OutputLast element: 1
The removeAllElements() method is used to remove all components from this vector and sets its size to zero. This method is identical in functionality to the clear method.Exampleimport java.util.Vector; public class VectorDemo { public static void main(String[] args) { Vector vec = new Vector(4); vec.add(4); vec.add(3); vec.add(2); vec.add(1); System.out.println("Added numbers are :- "); for (Integer number : vec) { System.out.println("Number = " + number); } System.out.println("Size of ... Read More
The capacity() method is used to return the current capacity of a vector. Capacity is the length of the array kept in the vector.Exampleimport java.util.Vector; public class VectorDemo { public static void main(String[] args) { Vector vec = new Vector(); vec.add(14); vec.add(13); vec.add(12); vec.add(11); vec.add(4); vec.add(3); vec.add(2); vec.add(1); System.out.println("Capacity of the vector is :"+vec.capacity()); } }OutputCapacity of the vector is :10
The elements() method is used to return an enumeration of the components of this vector. The returned Enumeration object will generate all items in this vector at the similar index location.Exampleimport java.util.Vector; public class VectorDemo { public static void main(String[] args) { Vector vec = new Vector(4); vec.add(4); vec.add(3); vec.add(2); vec.add(1); Enumeration e=vec.elements(); System.out.println("Numbers in the enumeration are :- "); while (e.hasMoreElements()) { System.out.println("Number = " + e.nextElement()); } } }OutputNumbers in the enumeration are :- Number = 4 Number = 3 Number = 2 Number = 1
The push(Object item) method is used to Pushes an item onto the top of this stack.Exampleimport java.util.*; public class StackDemo { public static void main(String args[]) { Stack st = new Stack(); st.push("Java"); st.push("Source"); st.push("code"); System.out.println("Elements in the stack: "+st); } }OutputElements in the stack: [Java, Source, code]
The peek() method is used to look at the object at the top of this stack without removing it from the stack.Exampleimport java.util.*; public class StackDemo { public static void main(String args[]) { Stack st = new Stack(); st.push("Java"); st.push("Source"); st.push("code"); System.out.println("Top object is: "+st.peek()); } }OutputTop object is: code
The empty() method is used to test if this stack is or not.Exampleimport java.util.*; public class StackDemo { public static void main(String args[]) { Stack st = new Stack(); st.push("Java"); st.push("Source"); st.push("code"); System.out.println("Is stack empty: "+st.empty()); } }OutputIs stack empty: false
The search(Object o) method is used to return the 1-based position where an object is on this stack.Exampleimport java.util.*; public class StackDemo { public static void main(String args[]) { Stack st = new Stack(); st.push("Java"); st.push("Source"); st.push("code"); System.out.println("Searching 'code' in stack: "+st.search("code")); } }OutputSearching 'code' in stack:
The clone() method of the java.util.ArrayList class returns a shallow copy of this ArrayList instance (i.e the elements themselves are not copied). Using this method, you can copy the contents of one array list to other.Exampleimport java.util.ArrayList; public class ArrayListDemo { public static void main(String args[]) { ArrayList arrlist1 = new ArrayList(); arrlist1.add(new StringBuilder("Learning-")); ArrayList arrlist2 = (ArrayList) arrlist1.clone(); StringBuilder strbuilder = arrlist1.get(0); strbuilder.append("list1, list2-both pointing to the same StringBuilder"); System.out.println("The 1st list prints: "); for (int i = ... Read More
A do...while loop is similar to a while loop, except that a do...while loop is guaranteed to execute at least one time.SyntaxFollowing is the syntax of a do...while loop −do { // Statements }while(Boolean_expression);Notice that the Boolean expression appears at the end of the loop, so the statements in the loop execute once before the Boolean is tested.If the Boolean expression is true, the control jumps back up to do statement, and the statements in the loop execute again. This process repeats until the Boolean expression is false.Examplepublic class Test { public static void main(String args[]) { ... Read More