Add coding examples

Author: gauravkukade

collections/arraylist/arraylist-ensurecapacity-method/ArrayListEnsureCapacityExample.java

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+package com.gaurav.ExProject.ArrayList;
+
+import java.util.ArrayList;
+/**
+ * An example java program for ensureCapacity(int MinCapacity) method 
+ * of the ArrayList class in java.
+ * @author Gaurav at coderolls.com
+ *
+ */
+public class ArrayListEnsureCapacityExample {
+
+	public static void main(String[] args) {
+		
+		// create an empty arraylist object 'states'
+		ArrayList<String> states = new ArrayList<>();
+
+		// add state in the arraylist
+		states.add("California");
+		states.add("Texas");
+		states.add("Montana");
+		states.add("Arizona");
+		states.add("Florida");
+		states.add("Michigan");
+		states.add("New Jersey");
+		states.add("Washington");
+		states.add("Ohio");
+		states.add("Minnesota");
+		states.add("Colorado");
+		states.add("Missouri");
+		states.add("Nevada");
+		System.out.println("ArrayList Elements are: \n"+ states);
+		//We need to add more states, so we will ensure 
+		//that arraylist should hold 50 elements
+		 states.ensureCapacity(50);
+		 
+		 System.out.println("\nWe ensured that the arraylist should hold 50 elements.");
+	}
+
+}

collections/arraylist/arraylist-listiterator-method/ArrayListListIteratorExample.java

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+package com.gaurav.ExProject.ArrayList;
+
+import java.util.ArrayList;
+import java.util.ListIterator;
+/**
+ * An example java program about the listIterator()
+ * method of the arrayList.
+ * 
+ * @author coderolls.com
+ */
+public class ArrayListListIteratorExample {
+
+	public static void main(String[] args) {
+		
+		ArrayList<String> states = new ArrayList<>();
+
+		// add state in the arraylist
+		states.add("California");
+		states.add("Texas");
+		states.add("Montana");
+		states.add("Arizona");
+		states.add("Florida");
+		states.add("Michigan");
+		states.add("New Jersey");
+		states.add("Washington");
+		states.add("Ohio");
+		
+		ListIterator<String> itr = states.listIterator();
+		
+		while(itr.hasNext()) {
+			String state = itr.next();
+			System.out.println("The state :"+ state);
+		}
+	}
+}

collections/arraylist/arraylist-listiterator-method/ArrayListListIteratorExample2.java

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+package com.gaurav.ExProject.ArrayList;
+
+import java.util.ArrayList;
+import java.util.ListIterator;
+/**
+ * An example java program about the listIterator()
+ * method of the arrayList.
+ * 
+ * @author coderolls.com
+ */
+public class ArrayListListIteratorExample2 {
+
+	public static void main(String[] args) {
+		
+		ArrayList<String> states = new ArrayList<>();
+
+		// add state in the arraylist
+		states.add("California");
+		states.add("Texas");
+		states.add("Montana");
+		states.add("Arizona");
+		states.add("Florida");
+		states.add("Michigan");
+		states.add("New Jersey");
+		states.add("Washington");
+		states.add("Ohio");
+		
+        //given index 3 iterator start from element with index 3
+		ListIterator<String> itr = states.listIterator(3);
+		
+		while(itr.hasNext()) {
+			String state = itr.next();
+			System.out.println("The state :"+ state);
+		}
+	}
+}

collections/arraylist/arraylist-listiterator-method/ArrayListListIteratorException.java

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+package com.gaurav.ExProject.ArrayList;
+
+import java.util.ArrayList;
+import java.util.ListIterator;
+/**
+ * An example java program about the listIterator()
+ * method of the arrayList.
+ * 
+ * @author coderolls.com
+ */
+public class ArrayListListIteratorException {
+
+	public static void main(String[] args) {
+		
+		ArrayList<String> states = new ArrayList<>();
+
+		// add state in the arraylist
+		states.add("California");
+		states.add("Texas");
+		states.add("Montana");
+		states.add("Arizona");
+		states.add("Florida");
+		states.add("Michigan");
+		states.add("New Jersey");
+		states.add("Washington");
+		states.add("Ohio");
+		
+        //given index 120, it will  throw IndexOutOfBoundsException
+		ListIterator<String> itr = states.listIterator(120);
+		
+		while(itr.hasNext()) {
+			String state = itr.next();
+			System.out.println("The state :"+ state);
+		}
+	}
+}