import java.util.Arrays; class Test { Object[] myOs; int[][] myIIs; int[] myIs; public boolean equals(Object o) { if (this == o) return true; if (o == null || getClass() != o.getClass()) return false; final Test test = (Test) o; // Compare nested arrays - values of myIIs here if (!Arrays.equals(myIs, test.myIs)) return false; // Probably incorrect - comparing Object[] arrays with Arrays.equals if (!Arrays.equals(myOs, test.myOs)) return false; return true; } public int hashCode() { int result = myOs != null ? Arrays.hashCode(myOs) : 0; result = 31 * result + (myIIs != null ? Arrays.hashCode(myIIs) : 0); result = 31 * result + (myIs != null ? Arrays.hashCode(myIs) : 0); return result; } }