简化你的 java 字符串操作：Guava 之 CharMatcher 用法简介

2014-09-19

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JAVA

摘要:简化你的 java 字符串操作：Guava 之 CharMatcher 用法简介

	ref:http://my.oschina.net/leejun2005/blog/178569

	String str = "FirstName LastName +1 123 456 789 !@#$%^&*()_+|}{:\"?><";

	// Use a predefined constant (predefine CharMatcher) 

	CharMatcher.DIGIT.retainFrom(str);

	Output:->

	"1123456789"

	CharMatcher.JAVA_LETTER.retainFrom(str);

	Output:->

	"FirstNameLastName"

	CharMatcher.JAVA_LETTER_OR_DIGIT.retainFrom(str);

	Output:->

	"FirstNameLastName1123456789"

	CharMatcher.ANY.countIn(str)

	Output:->

	54

	CharMatcher.DIGIT.countIn(str);

	Output:->

	10

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