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import java.lang.reflect.*;
 
class Golf
{
    public static void main (String[] args) throws java.lang.Exception
    {
        Field value = Integer.class.getDeclaredField("value");      
        value.setAccessible(true);
        Integer victim = 0;
        value.setInt(victim, -2);
 
        for (Integer x = 0; x < 3; x++)
            System.out.println(x);
    }
}

Runtime error #stdin #stdout 0.11s 974336KB

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https://ideone.com/3Q0Kzc

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Java (HotSpot 12)

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