import java.util.Arrays; public class DataExample { private final String name; private int age; private double score; private String[] tags; public DataExample(String name) { this.name = name; } public String getName() { return this.name; } void setAge(int age) { this.age = age; } public int getAge() { return this.age; } public void setScore(double score) { this.score = score; } public double getScore() { return this.score; } public String[] getTags() { return this.tags; } public void setTags(String[] tags) { this.tags = tags; } @Override public String toString() { return "DataExample(" + this.getName() + ", " + this.getAge() + ", " + this.getScore() + ", " + Arrays.deepToString(this.getTags()) + ")"; } @Override public boolean equals(Object o) { if (o == this) return true; if (o == null) return false; if (o.getClass() != this.getClass()) return false; DataExample other = (DataExample) o; if (this.getName() == null ? other.getName() != null : !this.getName().equals(other.getName())) return false; if (this.getAge() != other.getAge()) return false; if (Double.compare(this.getScore(), other.getScore()) != 0) return false; if (!Arrays.deepEquals(this.getTags(), other.getTags())) return false; return true; } @Override public int hashCode() { final int PRIME = 31; int result = 1; final long temp1 = Double.doubleToLongBits(this.getScore()); result = (result*PRIME) + (this.getName() == null ? 0 : this.getName().hashCode()); result = (result*PRIME) + this.getAge(); result = (result*PRIME) + (int)(temp1 ^ (temp1 >>> 32)); result = (result*PRIME) + Arrays.deepHashCode(this.getTags()); return result; } public static class Exercise<T> { private final String name; private final T value; private Exercise(String name, T value) { this.name = name; this.value = value; } public static <T> Exercise<T> of(String name, T value) { return new Exercise<T>(name, value); } public String getName() { return this.name; } public T getValue() { return this.value; } @Override public String toString() { return "Exercise(name=" + this.getName() + ", value=" + this.getValue() + ")"; } @Override public boolean equals(Object o) { if (o == this) return true; if (o == null) return false; if (o.getClass() != this.getClass()) return false; Exercise<?> other = (Exercise<?>) o; if (this.getName() == null ? other.getValue() != null : !this.getName().equals(other.getName())) return false; if (this.getValue() == null ? other.getValue() != null : !this.getValue().equals(other.getValue())) return false; return true; } @Override public int hashCode() { final int PRIME = 31; int result = 1; result = (result*PRIME) + (this.getName() == null ? 0 : this.getName().hashCode()); result = (result*PRIME) + (this.getValue() == null ? 0 : this.getValue().hashCode()); return result; } } }