String m_string=”1234″;
public static void main(String args[]){
StringBuffer a=new StringBuffer(“A”);
StringBuffer b=new StringBuffer(“B”);
mb_operate(a,b);
System.out.print(a+”.”+b);
}
static void mb_operate(StringBuffer x,StringBuffer y){
x.append(y);
y=new StringBuffer(“AB”);
} }
A A.B B A.A C AB.AB D AB.B