Java Reflection - Field.setLong() Examples

[Last Updated: Nov 8, 2025]

Class:

java.lang.reflect.Field

Method:

public void setLong(Object obj,
                    long l)
             throws IllegalArgumentException,
                    IllegalAccessException

Sets the value of a field as a long on the specified object.

Examples

package com.logicbig.example.field;

import java.lang.reflect.Field;

public class SetLongExample {
    private long myLong;

    public static void main(String... args) throws NoSuchFieldException, IllegalAccessException {
        Field f = SetLongExample.class.getDeclaredField("myLong");
        SetLongExample instance = new SetLongExample();
        f.setLong(instance, 15L);
        System.out.println(f.getLong(instance));
    }
}

Java Reflection - Field.setLong() Examples

Class:

Method:

Examples

Output

See Also