Java Data Type - 如何检查当前字符串的日期格式是否根据所需格式

import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Date;

public class Main {

  public static void main(String[] args) {
    System.out.println("isValid - dd/MM/yyyy with 20150925 = "
        + isValidFormat("dd/MM/yyyy", "20150925"));
    System.out.println("isValid - dd/MM/yyyy with 25/09/2015 = "
        + isValidFormat("dd/MM/yyyy", "25/09/2015"));
  }

  public static boolean isValidFormat(String format, String value) {
    Date date = null;
    try {
      date = new SimpleDateFormat(format).parse(value);
    } catch (ParseException ex) {
      ex.printStackTrace();
    }
    return date != null;
  }

}