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String str = "erei5394";
第一种还来的快简单
System.out.println("4".equals(str.substring(str.length()-1, str.length())));
第二种就是用find
Pattern pattern = Pattern.compile("4$");
Matcher isMathe = pattern.matcher(str);
System.out.println(isMathe.find());
Pattern pattern = Pattern.compile("[\\d]+4$");
Matcher isMathe = pattern.matcher("13110420125");
Pattern pattern = Pattern.compile("4$");
Matcher isMathe = pattern.matcher("1234564");
System.out.println(isMathe.find());
Pattern pattern = Pattern.compile("^.*4$");
Matcher isMathe = pattern.matcher("1234564");
return isMathe.matches();