任意输入一个自然数，判断其是否为自守数并输出相应信息

任意输入一个自然数，判断其是否为自守数并输出相应信息

public class ZishouNumber {
public static void main(String[] args) {
for(int i = 1; i < 10000; i++){
String strI = String.valueOf(i);
String multiStr = String.valueOf(i*i);
String last = multiStr.substring(multiStr.length() - strI.length());
if(last.equals(strI)){
System.out.println(i + "*" + i + "=" + multiStr + "--> " + i + " is Zishoushu");
}
}
}
}