Java 如何在Hadoop中将String对象转换为IntWritable Object
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原文地址: http://stackoverflow.com/questions/19425949/
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How to convert String object to IntWritable Object in Hadoop
提问by Sujana
I want to convert Stringobject to IntWritableObject in Hadoop.
any process is available for conversion.
我想在 Hadoop 中将String对象转换为IntWritable对象。任何过程都可以进行转换。
回答by Stephen C
IntWritable value = new IntWritable(Integer.parseInt(someString))
... and deal with the possibility that parseIntmay throw a NumberFormatException.
... 并处理parseInt可能抛出NumberFormatException.
Someone asked:
有人问：
How to overcome this NumberFormatException ???
如何克服这个 NumberFormatException ？？？
The exception will occur if someStringdoes not represent an integer.
如果someString不代表整数，则会发生异常。
What do you do?
你做什么工作？
You catch it and handle it of course! How you handle it (i.e. what you should code your application to do) will depending on the context. We can't advise on that.
你当然抓住它并处理它！您如何处理它（即您应该编写应用程序来做什么）将取决于上下文。我们不能就此提出建议。
Java exceptions and exception handling are described in the Oracle Java Tutorials - here.
Java 异常和异常处理在 Oracle Java 教程 -此处进行了描述。
