Java replaceAll () method

Java String class

replaceAll () method uses the given parameters replacement of all the replacement string matches the given regular expression substring.

grammar

public String replaceAll(String regex,
                         String replacement)

parameter

• regex - matches the regular expression string.

• newChar - the string used to replace each match.

return value

The success of the replacement string is returned, then failed to return the original string.

Examples

public class Test {
	public static void main(String args[]) {
		String Str = new String("www.google.com");

		System.out.print("匹配成功返回值 :" );
		System.out.println(Str.replaceAll("(.*)google(.*)",
                            "w3big" ));
		System.out.print("匹配失败返回值 :" );
		System.out.println(Str.replaceAll("(.*)taobao(.*)",
                            "w3big" ));
	}
}

The above program execution results:

匹配成功返回值 :w3big
匹配失败返回值 :www.google.com

Java String class