Answer:
import java.util.*;
import java.util.Scanner;
class Main
{
public static void main(String[] args) {
System.out.println("Enter String");
Scanner sc1=new Scanner(System.in);
String s1= sc1.nextLine();
boolean b= isNumerc(s1);
if (b== true)
{
System.out.println("Its number: Sorry");
}
else
{
boolean a=isStringUpperCas(s1);
if(a == false)
{
System.out.println(s1.toUpperCase());
}
else
{
System.out.println(s1.toLowerCase());
}
}
}
private static boolean isStringUpperCas(String st1){
char[] arr = st1.toCharArray();
int k =0; boolean flag=true;
while(k<arr.length)
{
if( Character.isUpperCase( arr[k] ))
{
flag=true;
k++;
}
else
{
flag=false;
k++;
}
}
return flag;
}
public static boolean isNumerc(final String st1) {
if (st1 == null || st1.length() == 0) {
return false;
}
for (char ch : st1.toCharArray()) {
if (!Character.isDigit(ch)) {
return false;
}
}
return true;
}
}
Explanation:
Please find the program above.
