正则表达式问题

public static void main(String args[]) {
    String str="For my money, the important thing "+"about the meeting was bridge-building";
     String regEx="([a-zA-Z0-9]|[_])*";
     Pattern p=Pattern.compile(regEx);
    Matcher m=p.matcher(str);
     boolean result=m.find();
    System.out.println(result);
                     }如何调用main方法测试？