如何在一个字符串搜索一个特定的词？

解决方法

下面的例子演示了如何在字符串中使用regex.Matcher类的matcher.start()方法搜索一个特定的词。

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);
   }
}

结果

上面的代码示例将产生以下结果。

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