Slip
1. Write a java program to read the characters from a file, if a character is
alphabet then reverse its case, if not then display its category on the Screen.
(whether it is Digit or Space).
import
java.io.*;
class
Slip1
{
public
static void main(String a[]) throws Exception
{
BufferedReader
br = new BufferedReader(new InputStreamReader(System.in));
System.out.println("Enter
file name ");
String
f1=br.readLine();
FileReader
fr = new FileReader(f1);
int
ch ;
while((ch=fr.read())!=
-1)
{
char
c = (char)ch;
if(Character.isUpperCase(c))
{
c=Character.toLowerCase(c);
System.out.print(c);
}
else
if(Character.isLowerCase(c))
{
c=Character.toUpperCase(c);
System.out.print(c);
}
else
if(Character.isDigit(c))
{
System.out.println(c+"Digit");
}
else
if(Character.isSpace(c))
System.out.println(c+"Space");
else
System.out.println(c);
}
fr.close();
}
}
