如何在一個字符串搜索一個特定的詞？

解決方法

下麵的例子演示了如何在字符串中使用regex.Matcher類的matcher.start()方法搜索一個特定的詞。

import java.util.regex.Matcher;
import java.util.regex.Pattern;

public class Main {
   public static void main(String args[]) {
      Pattern p = Pattern.compile("j(ava)");
      String candidateString = "This is a java program. 
      This is another java program.";
      Matcher matcher = p.matcher(candidateString);
      int nextIndex = matcher.start(1);
      System.out.println(candidateString);
      System.out.println("The index for java is:" 
      + nextIndex);
   }
}

結果

上麵的代碼示例將產生以下結果。

This is a java program. This is another java program.
The index for java is: 11