hadoop - 比较 if 语句中的两个 LongWritable

Question

如何在 If 语句中比较两个 LongWritable ??? 喜欢，

if(compareTo(key1,new LongWritable(1))
 { 

    //do something;
 }

Answer 1

LongWritable 实现 Comparable 所以使用 compareTo 方法：

if (lw1.compareTo(lw2) == 0) {
  // lw1 has same value as lw2
}