在Java编程中，如何拆分正则表达式和字符串？
以下示例演示如何使用Matcher类的replaceFirst()方法替换字符中指定的子字符串的首次出现。
package com.yiibai;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
public class ReplaceFirstOccurrence {
public static void main(String args[]) {
Pattern p = Pattern.compile("hello");
String instring = "hello, hello word.";
System.out.println("initial String: " + instring);
Matcher m = p.matcher(instring);
String tmp = m.replaceFirst("Java");
System.out.println("String after replacing 1st Match: " + tmp);
}
}
上述代码示例将产生以下结果 -
initial String: hello, hello word.
String after replacing 1st Match: Java, hello word.
