String类的一些方法

　　String 类有以下方法：

startsWith(String prefix)

boolean java.lang.String.startsWith(String prefix)

Tests if this string starts with the specified prefix.

Parameters:

prefix the prefix.

Returns:

true if the character sequence represented by the argument is a prefix of the character sequence represented by this string; false otherwise. Note also that true will be returned if the argument is an empty string or is equal to this String object as determined by the equals(Object) method.

Since:

1. 0

就是判断字符串中的后缀是否为参数prefix，如果是就返回true，如果不是就返回false。

这在安卓中可以用来识别音频文件，如mp3文件等。

对应的，还有一个方法，

endsWith(String suffix)

boolean java.lang.String.endsWith(String suffix)

Tests if this string ends with the specified suffix.

Parameters:

suffix the suffix.

Returns:

true if the character sequence represented by the argument is a
suffix of the character sequence represented by this object; false
otherwise. Note that the result will be true if the argument is the
empty string or is equal to this String object as determined by the
equals(Object)
method.

可以用来判断一个字符串是否以suffix这个参数开头。