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使用System.out.printf（）的优点和缺点;

[英]Advantages and Disadvantages of using System.out.printf();

原文 2011-06-20 13:06:10 8 2 java

I was just wondering what were the advantages and disadvantages of using System.out.printf(); 我只是想知道使用System.out.printf();的优点和缺点是什么System.out.printf(); We normally use System.out.println(); 我们通常使用System.out.println(); or System.out.print(); 或System.out.print(); but will it make a difference if we use System.out.printf(); 但如果我们使用System.out.printf();它会有所作为System.out.printf(); ? ？ Is there a specific disadvantage or advantage to using System.out.printf(); 使用System.out.printf();是否存在特定的缺点或优势System.out.printf(); or any other print statements? 或任何其他印刷声明？

Thanks. 谢谢。

EDIT: Yes, I do know the difference between printf and println. 编辑：是的，我知道printf和println之间的区别。

2 个解决方案

Printf allows special formatting: Printf允许特殊格式化：

http://java.sun.com/developer/technicalArticles/Programming/sprintf/ http://java.sun.com/developer/technicalArticles/Programming/sprintf/

That is the advantage. 这是优势。 Otherwise there is no disadvantage to calling print() as you do now. 否则，就像现在一样调用print（）没有缺点。

Look at the JavaDoc of the class PrintStream. 查看PrintStream类的JavaDoc 。 There you can see that the print / println methods print a String and printf is 在那里你可以看到print / println方法打印一个String而printf是

A convenience method to write a formatted string to this output stream 将格式化字符串写入此输出流的便捷方法

using the specified format string and arguments. 使用指定的格式字符串和参数。