java - IntWritable.set(IntWritable) 抛出错误

Question

在编写示例代码以测试 hadoop 中的自定义数据时。我收到以下错误:

The method set(int) in the type IntWritable is not applicable for the arguments (IntWritable)

我已经检查了 IntWritable.set(int value) 的 set 方法。如何将 hadoop IntWritable 转换为 Int 然后返回 IntWritable#set 方法将转换回 IntWritable.

public class customText implements Writable{

private Text depName;

//default constr
private IntWritable depId;
customText(){
    this.depName = new Text();
    this.depId = new IntWritable();

}

customText(Text depName , IntWritable depId ){

    this.depName.set(depName);
    this.depId.set(depId);

我也试过 this.depid=depId 但没有成功。

谢谢

Answer 1

应该是:

customText(Text depName , IntWritable depId ){
    this.depName.set(depName);
    this.depId.set(depId.get());
}

set 的方法签名是set(int value)，因此您必须get() IntWritable 中的int。