上述代码示例将产生以下结果 -

Date :8-05-1998: matches with the this date Pattern:\d{4}-\d{1,2}-\d{1,2}Ans:false
Date :1997-08-16: matches with the this date Pattern:\d{4}-\d{1,2}-\d{1,2}Ans:true
Shell
以下是检查日期是否正确格式的另一个示例。
package com.yiibai;
import java.util.ArrayList;
import java.util.List;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
public class CheckDateFormat2 {
    public static void main(String args[]) {
        List dates = new ArrayList();
        dates.add("1990-12-21");
        dates.add("1990-12-31");
        dates.add("1990-12-32");
        dates.add("09-12-12");
        dates.add("2001-02-10");
        String regex = "^([0-9]{4})-(1[0-2]|0[1-9])-(3[01]|[12][0-9]|0[1-9])$";
        Pattern pattern = Pattern.compile(regex);
        for (Object date : dates) {
            Matcher matcher = pattern.matcher((CharSequence) date);
            System.out.println(date + " : " + matcher.matches());
上述代码示例将产生以下结果 -
1990-12-21 : true
1990-12-31 : true
1990-12-32 : false
09-12-12 : false
2001-02-10 : true