compare custom objects between each other

CompareObject.java

// this is also useful for things like MyObj.contain(instance)
@Override
public boolean equals(Object compared) {
    boolean flag = false;

    if (this == compared) {
        flag = true;
    } else if (compared instanceof MyObj) {
        Book comparedMyObj = (MyObj) compared;

        flag = this.astring.equals(comparedMyObj.getAstring()) &&
             this.val == comparedMyObj.getVal();
    }

    return flag;
}