The java.lang.reflect.Array.getBoolean() returns the given index from the specified Array as a short.
Syntax:
Array.getBoolean(Object []array,int index)
Parameters:
- array: The object array whose index is to be returned.
- index: The particular index of the given array. The element at ‘index’ in the given array is returned.
Return Type: This method returns the element of the array as boolean.
Note: Typecast isn’t necessary as the return type is boolean.
Exception: This method throws following exception
- NullPointerException – when the array is null.
- IllegalArgumentException – when the given object array is not an Array.
- ArrayIndexOutOfBoundsException – if the given index is not in the range of the size of the array.
Below programs illustrate the getBoolean() method of Array class:
Program 1:
// Java code to demonstrate getBoolean() method of Array classimport java.lang.reflect.Array;public class GfG { // main method public static void main(String[] args) { // Declaring and defining a boolean array boolean a[] = {true,true,false}; // Traversing the array for(int i = 0;i<3;i++){ // Array.getBoolean() method boolean x = Array.getBoolean(a, i); // Printing the values System.out.print(x + " "); } }} |
Output:
true true false
Program 2:
// Java code to demonstrate getBoolean() method in Arrayimport java.lang.reflect.Array; public class GfG { // main method public static void main(String[] args) { // Declaring and defining a boolean array boolean a[] = {true,true,false}; try { // invalid index boolean x = Array.getBoolean(a, 6); System.out.println(x); } catch (Exception e) { // throws Exception System.out.println("Exception : " + e); } }} |
Output:
Exception : java.lang.ArrayIndexOutOfBoundsException
Program 3:
// Java code to demonstrate getBoolean() method in Arrayimport java.lang.reflect.Array; public class GfG { // main method public static void main(String[] args) { // Declaring and defining a boolean array to null boolean a[] = null; try { // null Object array boolean x = Array.getBoolean(a, 6); System.out.println(x); } catch (Exception e) { // throws Exception System.out.println("Exception : " + e); } }} |
Output:
Exception : java.lang.NullPointerException
Program 4:
// Java code to demonstrate getBoolean() method in Arrayimport java.lang.reflect.Array; public class GfG { // main method public static void main(String[] args) { // Declaring and defining a boolean variable boolean a = true; try { // illegalArgument boolean x = Array.getBoolean(a, 6); System.out.println(x); } catch (Exception e) { // throws Exception System.out.println("Exception : " + e); } }} |
Output:
Exception : java.lang.IllegalArgumentException: Argument is not an array
