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Java Reflection - Array.getBoolean() Examples

Java Reflection Java Java API

Class:

java.lang.reflect.Array

Method:

public static boolean getBoolean(Object array,
                                 int index)
                          throws IllegalArgumentException,
                                 ArrayIndexOutOfBoundsException

Returns the value of the indexed component in the specified array object, as a boolean

Examples

package com.logicbig.example.array;

import java.lang.reflect.Array;

public class GetBooleanExample {

    public static void main(String... args) {
        boolean[] ar = {true, false, true, true};
        boolean b = Array.getBoolean(ar, 2);
        System.out.println(b);
    }
}

Output

true

This method does not work for Array of Boolean objects:

package com.logicbig.example.array;

import java.lang.reflect.Array;

public class GetBooleanExample2 {

    public static void main(String... args) {
        Boolean[] ar = {true, false, true, true};
        boolean b = Array.getBoolean(ar, 2);
        System.out.println(b);
    }
}

Output

Caused by: java.lang.IllegalArgumentException: Argument is not an array of primitive type
	at java.base/java.lang.reflect.Array.getBoolean(Native Method)
	at com.logicbig.example.array.GetBooleanExample2.main(GetBooleanExample2.java:16)
	... 6 more

See Also