JAVA PROGRAM CONTAINING 4 METHODS

JAVA PROGRAM CHỨA 4 METHODS .
 String display(), void run(), void go(), void start()
class Rextester {  
        String outerStr = " This is outer String .\n"  ;
class MemberClass {
        String innerStr =  " This is inner String .\n" ;     
        String display(String parameter) { 
            return innerStr +  outerStr + parameter;
        }       
    } 
    public static void main(String[] args) {
               Rextester outer = new Rextester();  
                         outer.run() ;
               Rextester outer1 = new Rextester();  
                         outer1.go() ;
               Rextester outer2 = new Rextester();  
                         outer2.start() ;
       }   
       void run() {  
        MemberClass local = new MemberClass();
        System.out.println(local.display(" display is the 1st method of inner class. "));
         }
        void go() {
         System.out.println(" This is the second method of outer class.");
        } 
         void start() {
         System.out.println(" This is the third method of outer class. ");
        } 
     }
OUTPUT.
run is the 1st method of outer class.
 This is inner String .
 This is outer String . 
display is the 1st method of inner class. 
go is the second method of outer class.
start is the third method of outer class.