Encyption of string asked in AMCAT

class Encryption{
static void intEncrypt(String string){
String str = string;
char[] ch = str.toCharArray();
char ch1[] = new char[ch.length];
//displaying the entered string
System.out.println("\nEncrypted String is ::");
for(int i=0;i<ch.length;i++)
{
System.out.print(ch[i]);
}
int c=ch.length-1;
for(int i=0;i<ch.length;i++)
{
ch1[i]=(char)(ch[i]+c);
c--;
}
//reverse print
System.out.println("\nEncrypted String is ::");
for( int i=0;i<=ch1.length-1;i++)
System.out.print((ch1[i]));
}
public static void main(String args[]){
String str="sample";
intEncrypt(str);
}
}