JAVA 正则表达式的提取数据是什么？

Question

JAVA 正则表达式的提取数据是什么？ 

Answer 1

Pattern p = Pattern.compile("(name:)([a-zA-Z]*)(,age:)([0-9]*)");
Matcher m = p.matcher("name:vunv,age:20");
while (m.find()) {
System.out.println(m.group(2));
System.out.println(m.group(4));
}