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Java Reflection - Field.getInt() Examples

Java Reflection Java Java API 

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Class:

java.lang.reflect.Field

java.lang.Objectjava.lang.Objectjava.lang.reflect.AccessibleObjectjava.lang.reflect.AccessibleObjectjava.lang.reflect.AnnotatedElementAnnotatedElementjava.lang.reflect.Fieldjava.lang.reflect.Fieldjava.lang.reflect.MemberMemberLogicBig

Method:

public int getInt(Object obj)
           throws IllegalArgumentException,
                  IllegalAccessException

Gets the value of a static or instance field of type int or of another primitive type convertible to type int via a widening conversion.


Examples


package com.logicbig.example.field;

import java.lang.reflect.Field;

public class GetIntExample {
    private int i = 10;

    public static void main(String... args) throws NoSuchFieldException, IllegalAccessException {
        Field field = GetIntExample.class.getDeclaredField("i");
        int fieldValue = field.getInt(new GetIntExample());
        System.out.println(fieldValue);
    }
}

Output

10




Widening conversion from byte to int:

package com.logicbig.example.field;

import java.lang.reflect.Field;

public class GetIntExample2 {
    private byte b = 20;

    public static void main(String... args) throws NoSuchFieldException, IllegalAccessException {
        Field field = GetIntExample2.class.getDeclaredField("b");
        int fieldValue = field.getInt(new GetIntExample2());
        System.out.println(fieldValue);
    }
}

Output

20




Static field example:

package com.logicbig.example.field;

import java.lang.reflect.Field;

public class GetIntExample3 {
    private static int i = 100;

    public static void main(String... args) throws NoSuchFieldException, IllegalAccessException {
        Field field = GetIntExample3.class.getDeclaredField("i");
        int fieldValue = field.getInt(new GetIntExample3());
        System.out.println(fieldValue);
    }
}

Output

100

See Also