How to overwrite equals() and hashcode()

equals_hashcode.java

@Override
public boolean equals(Object other) {
	if (this == other) return true;
	if (!(other instanceof MyClass)) return false;
	final MyClass that = (MyClass) other;
	return this.intField == that.intField &&
	       this.booleanField == that.booleanField &&
	       (this.stringField == null ? this.stringField == null : this.stringField.equals(that.stringField)) &&
	       (this.objectField == null ? this.objectField == null : this.objectField.equals(that.objectField));
}

@Override
public int hashCode() {
	int result = 17;
	result = 37 * result + intField;
	result = 37 * result + (booleanField ? 1 : 0);
	result = 37 * result + (this.stringField == null ? 0 : stringField.hashCode());
	result = 37 * result + (this.objectField == null ? 0 : objectField.hashCode());
	return result;
}