使用Java语言编写自定义验证一个整数是否代表闰年的匹配器。如果该整数是400的倍数或者是4的倍数而不是100的倍数,则判定为闰年,否则判定为不是闰年。当该整数小于1时则判定为不是闰年。要求匹配器的类名为LeapYear,返回匹配器对象的静态方法名为leapYear()。
时间: 2023-05-18 21:06:12 浏览: 71
以下是使用Java语言编写自定义验证一个整数是否代表闰年的匹配器的代码:
```java
import java.util.regex.Matcher;
import java.util.regex.Pattern;
public class LeapYear {
public static Matcher leapYear() {
String regex = "^(?!0)\\d{1,4}$"; // 匹配非零的1-4位整数
Pattern pattern = Pattern.compile(regex);
return new Matcher() {
@Override
public Pattern pattern() {
return pattern;
}
@Override
public boolean matches() {
int year = Integer.parseInt(group());
if (year < 1) {
return false;
}
return year % 400 == 0 || (year % 4 == 0 && year % 100 != 0);
}
@Override
public boolean find() {
throw new UnsupportedOperationException();
}
@Override
public int start() {
throw new UnsupportedOperationException();
}
@Override
public int start(int i) {
throw new UnsupportedOperationException();
}
@Override
public int end() {
throw new UnsupportedOperationException();
}
@Override
public int end(int i) {
throw new UnsupportedOperationException();
}
@Override
public String group() {
return group(0);
}
@Override
public String group(int i) {
return input();
}
@Override
public int groupCount() {
return 1;
}
@Override
public String replaceAll(String s) {
throw new UnsupportedOperationException();
}
@Override
public String replaceFirst(String s) {
throw new UnsupportedOperationException();
}
@Override
public boolean lookingAt() {
throw new UnsupportedOperationException();
}
@Override
public Matcher reset() {
throw new UnsupportedOperationException();
}
@Override
public Matcher reset(CharSequence charSequence) {
throw new UnsupportedOperationException();
}
@Override
public boolean hasAnchoringBounds() {
throw new UnsupportedOperationException();
}
@Override
public boolean hasTransparentBounds() {
throw new UnsupportedOperationException();
}
@Override
public int regionStart() {
throw new UnsupportedOperationException();
}
@Override
public Matcher region(int i, int i1) {
throw new UnsupportedOperationException();
}
@Override
public int regionEnd() {
throw new UnsupportedOperationException();
}
@Override
public boolean hitEnd() {
throw new UnsupportedOperationException();
}
@Override
public boolean requireEnd() {
throw new UnsupportedOperationException();
}
@Override
public String input() {
throw new UnsupportedOperationException();
}
@Override
public Matcher usePattern(Pattern pattern) {
throw new UnsupportedOperationException();
}
@Override
public Matcher appendReplacement(StringBuffer stringBuffer, String s) {
throw new UnsupportedOperationException();
}
@Override
public StringBuffer appendTail(StringBuffer stringBuffer) {
throw new UnsupportedOperationException();
}
};
}
}
```
该匹配器的类名为LeapYear,返回匹配器对象的静态方法名为leapYear()。
如果你有任何关于该代码的问题或建议,请随时告诉我。
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