Java 字符串方法replaceFirst，replaceAll和split。

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import java.util.Arrays;

/*n o w j a v a . c o m - 时  代  Java 提供*/

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public class Main

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{

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   public static void main(String[] args)

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   {

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      String firstString = "This sentence ends in 5 stars *****";

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      String secondString = "1, 2, 3, 4, 5, 6, 7, 8";

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      System.out.printf("Original String 1: %s\n", firstString);

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      // replace '*' with '^'

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      firstString = firstString.replaceAll("\\*", "^");

      /*

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      */

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      System.out.printf("^ substituted for *: %s\n", firstString);

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      // replace 'stars' with 'carets'

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      firstString = firstString.replaceAll("stars", "carets");

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      System.out.printf(

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         "\"carets\" substituted for \"stars\": %s\n", firstString);

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      // replace words with 'word'

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      System.out.printf("Every word replaced by \"word\": %s\n\n",

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         firstString.replaceAll("\\w+", "word"));

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      System.out.printf("Original String 2: %s\n", secondString);

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      // replace first three digits with 'digit'     

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      for (int i = 0; i < 3; i++)

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         secondString = secondString.replaceFirst("\\d", "digit");

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      System.out.printf(

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