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import java.util.Scanner;
import java.util.regex.Pattern;
public class CopyOfTest {
public static void main(String[] args) {
Scanner s = new Scanner(System.in);
System.out.println("请输入:");
String str = s.nextLine();
Pattern p = Pattern.compile("(\\d{3}-){2}\\d{3}");
if (p.matcher(str).matches()) {
System.out.println("输入合法!");
} else {
System.out.println("输入不合法!");
}
s.close();
}
}
public static void main(String[] args) {
String str = "400-123-456";
Pattern p = Pattern.compile("(\\d{3}-){2}\\d{3}");
System.out.println(p.matcher(str).matches());
}