Add java programs to convert an arraylist to array

Author: gauravkukade

collections/arraylist/convert-arraylist-to-array/ArrayListToArray.java

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+package com.gaurav.ExProject.ArrayList;
+
+import java.util.ArrayList;
+
+/**
+ * A java program to convert an ArrayList to array using
+ * toArray method.
+ * 
+ * toArray() method returns Object[]
+ * 
+ * @author Gaurav Kukade at coderolls.com
+ *
+ */
+public class ArrayListToArray {
+
+	public static void main(String[] args) {
+		ArrayList<String> arrayList = new ArrayList<String>();
+		
+		//adding elements to the arrayList
+		arrayList.add("Meta");
+		arrayList.add("Apple");
+		arrayList.add("Amazon");
+		arrayList.add("Netflix");
+		arrayList.add("Microsoft");
+		arrayList.add("Google");
+		
+		System.out.println("ArrayList: \n"+ arrayList);
+		
+		// convert ArrayList to array
+		Object[] objects = arrayList.toArray();
+		
+		System.out.println("\nArray:");
+		
+		//we will receive the object array, so iterate on it to print each element
+		for(Object obj:objects) {
+			System.out.println(obj);
+		}
+	}
+}

collections/arraylist/convert-arraylist-to-array/ArrayListToArray2.java

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+package com.gaurav.ExProject.ArrayList;
+
+import java.util.ArrayList;
+
+/**
+ * A java program to convert an ArrayList to array using
+ * toArray method.
+ * 
+ * toArray(T[] a) method returns T[]
+ * 
+ * @author Gaurav Kukade at coderolls.com
+ *
+ */
+public class ArrayListToArray2 {
+
+	public static void main(String[] args) {
+		ArrayList<String> arrayList = new ArrayList<String>();
+		
+		//adding elements to the arrayList
+		arrayList.add("Meta");
+		arrayList.add("Apple");
+		arrayList.add("Amazon");
+		arrayList.add("Netflix");
+		arrayList.add("Microsoft");
+		arrayList.add("Google");
+		
+		System.out.println("ArrayList: \n"+ arrayList);
+		
+		// convert ArrayList to array
+		// pass a new String array of the arrayList size as a param to toArray
+		String[] elements = arrayList.toArray(new String[arrayList.size()]);
+		
+		System.out.println("\nArray:");
+		//we will receive the string array, so iterate on it to print each element
+		for(String str:elements) {
+			System.out.println(str);
+		}
+	}
+}