Java 示例 - 搜索单词

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  问题描述

  如何在字符串中搜索特定单词？
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  解决方案

  以下示例演示了如何借助 regex.Matcher 类的 matcher.start() 方法在字符串中搜索特定单词。

  
  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);
     }
  }
  

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  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
  

  以下是在字符串中搜索特定单词的示例。

  
  import java.util.regex.Matcher;
  import java.util.regex.Pattern;
  public class Main {
     public static void main(String[] args) {
        String s1 = "sairamkrishna mammahe JC2182 Pvt Ltd";
        String regex = "\\bPoint\\b";
        Pattern p1 = Pattern.compile(regex, Pattern.CASE_INSENSITIVE);
        Matcher m1 = p1.matcher(s1);
        
        while (m1.find()) {
           System.out.print("Start index: " + m1.start());
           System.out.print(" End index: " + m1.end() + " ");
           System.out.println(m1.group());
        } 
     }
  }
  

  上面的代码示例将产生以下结果。

  
  Start index: 32 End index: 37 Point