bookpk.java

来自「java的一系列产品中包括jsme,jmse,j2ee,本文件提供j2ee实现的」· Java 代码 · 共 30 行

package cmp;
import java.io.Serializable;

public final class BookPK implements Serializable {
  public int bookCode;
  public String publisher;
  public BookPK() {}
  public BookPK(String publisher, int bookCode) {
    this.bookCode = bookCode;
    this.publisher  = publisher;
  }
  public int hashCode() {
    return bookCode ^ publisher.hashCode();
  }

  public boolean equals(Object o) {
    if (o instanceof BookPK) {
      BookPK other = (BookPK) o;
      return other.bookCode == bookCode &&
        other.publisher.equals(publisher);
    } else {
      return false;
    }
  }

  public String toString() {
    return "[BookPK] bookCode: "+bookCode+ " publisher: "+publisher;
  }
}