public class test { 
public static void add3 （Integer i） 
int val = i.intValue （ ）； 
val += 3； 
i = new Integer （val）； 
}
public static void main （String args [ ] ）  { 
Integer  i = new Integer （0）； 
add3 （i）； 
system.out.printIn （i.intValue （ ）  ）； 
}
What is the result？（）  

Public class test （ 
Public static void stringReplace （String text）  （ 
Text = text.replace （‘j’ ， ‘i’）； 
） 
public static void bufferReplace （StringBuffer text）  （ 
text = text.append （“C”） 
）  
public static void main （String args[]}  （ 
String textString = new String （“java”）； 
StringBuffer text BufferString = new StringBuffer （“java”）； 
stringReplace （textString）； 
BufferReplace （textBuffer）； 
System.out.printLn （textString + textBuffer）； 
） 
）  
What is the output？（）