Java HashMap get works but containsKey does not

Question

I am trying to locate a key in a HashMap. I can print the selected key by using \'get\' but when I use \'containsKey\' in an if statement, it is not found.

I KNOW

Answer 1

i think sometime you need the hash code and sometimes not so i think in this way you can turn of the hash code checking when you want buy changing the hash code for all objects you want to 0

public class sample(){
    @JsonIgnore
    private int hashCode = super.hashCode();

    public void setHashCode(int hashCode){
        this.hashCode = hashCode;
    }    

    @Override
    public int hashCode(){
        return this.hashCode;
    }    

    @Override
    public boolean equals(Object obj) {
        if (obj == null) {
            return false;
        }
        if (getClass() != obj.getClass()) {
            return false;
        }
        final ReflectObject other = (ReflectObject) obj;
        if (this.hashCode != other.hashCode) {
            return false;
        }
        return true;
    }
}