在if语句中比较两个LongWritable

Question

如何在If语句中比较两个LongWritable ???像，

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

    //do something; 
} 

Answer 1

LongWritable实现可比所以使用compareTo方法：

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