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Java Reflection - Array.setLong() Examples

[Last Updated: Nov 8, 2025]

Java Reflection Java Java API

Class:

java.lang.reflect.Array

Method:

public static void setLong(Object array,
                           int index,
                           long l)
                    throws IllegalArgumentException,
                           ArrayIndexOutOfBoundsException

Sets the value of the indexed component of the specified array object to the specified long value.

Examples

package com.logicbig.example.array;

import java.lang.reflect.Array;
import java.util.Arrays;

public class SetLongExample {

    public static void main(String... args) {
        Object o = Array.newInstance(long.class, 3);
        for (int i = 0; i < 3; i++) {
            Array.setLong(o, i, i * 55);
        }
        System.out.println(Arrays.toString((long[]) o));
    }
}

Output

[0, 55, 110]

See Also