13)Write a java program to copy the contents of one file into the another file, while copying change the case of alphabets and replace all the digits by ‘*’ in target file.
import java.io.*;
class Slip13
{
public static void main(String[] args)throws Exception
{
int ch;
FileInputStream fin=new FileInputStream("abc.txt");
FileOutputStream fout=new FileOutputStream("xyz.txt");
while((ch=fin.read())!=-1)
{
//System.out.print((char)ch);
if((ch>=65)&&(ch<=91))
{
ch=ch+32;
fout.write(ch);
}
else
{
if(ch>=97&&ch<=122)
{
ch=ch-32;
fout.write(ch);
}
else
{
if((ch>=48)&&(ch<=57))
{
fout.write('*');
}
else
{
fout.write(ch);
}
}
}
}
System.out.println("File write is successfully");
fin.close();
fout.close();
}
}
}
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