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import java.util.*;
import org.apache.commons.lang3.builder.*;
 
public class Book implements Comparable<Book>, Cloneable {
 private String title;
 private Date publishDate;
 private String comment;
 
 public boolean equals(Object o) {
  return EqualsBuilder.reflectionEquals(this, o);
 }
 
 public int hashCode() {
  return HashCodeBuilder.reflectionHashCode(this);
 }
 
 public int compareTo(Book obj) {
  return CompareToBuilder.reflectionCompare(this, obj);
 }
 
 public Book clone() {
  Book result = new Book();
  result.title = this.title;
  result.publishDate = (Date) this.publishDate.clone();
  result.comment = this.comment;
  return result;
 }
}

Main.java:4: error: class Book is public, should be declared in a file named Book.java
public class Book implements Comparable<Book>, Cloneable {
       ^
Main.java:2: error: package org.apache.commons.lang3.builder does not exist
import org.apache.commons.lang3.builder.*;
^
Main.java:10: error: cannot find symbol
  return EqualsBuilder.reflectionEquals(this, o);
         ^
  symbol:   variable EqualsBuilder
  location: class Book
Main.java:14: error: cannot find symbol
  return HashCodeBuilder.reflectionHashCode(this);
         ^
  symbol:   variable HashCodeBuilder
  location: class Book
Main.java:18: error: cannot find symbol
  return CompareToBuilder.reflectionCompare(this, obj);
         ^
  symbol:   variable CompareToBuilder
  location: class Book
5 errors

Standard output is empty