java 正则表达式提取字符串

目标：从字符串 “1000037257 210.0508:1035890820 1043956783 1048873925"中提取：之前的浮点数。

 

public static void main(String[] args) {
	
		String regex = "\\b\\w*\\.\\w*(?=:)\\b";
		String source = "1000037257	210.0508:1035890820 1043956783 1048873925";
		Pattern pattern = Pattern.compile(regex);
		Matcher matcher = pattern.matcher(source);
		
		if(matcher.find())
		{
			System.out.println(matcher.group());
		}
		
	}

 

 

 

运行结果：210.0508