Java StringBuffer Class

1  Packagedemo03;2 3  Public classStringbufferdemo {4      Public Static voidMain (string[] args) {5 func ();6     }7     8      Public Static voidfunc () {9StringBuffer buffer =NewStringBuffer ();TenBuffer.append ("ABCD"). Append (1); OneSYSTEM.OUT.PRINTLN (buffer);//ABCD1 A          -Buffer.delete (1, 3); -SYSTEM.OUT.PRINTLN (buffer);//Ad1 the          -Buffer.insert (1, "123"); -SYSTEM.OUT.PRINTLN (buffer);//a123d1 -          +Buffer.replace (1, 4, "JDK")); -SYSTEM.OUT.PRINTLN (buffer);//ajdkd1 +          A buffer.reverse (); atSYSTEM.OUT.PRINTLN (buffer);//1dkdja -          -String s =buffer.tostring (); -System.out.println (s);//1dkdja -          -     } in}

Demo

1  Packagedemo03;2 3  Public classStringbuffertest {4     //{1,2,3,4,5} = [1,2,3,4,5]5      Public Static voidMain (string[] args) {6         int[] arr = {1,2,3,4,5};7 System.out.println (toString (arr));8     }9     Ten      Public StaticString toString (int[] arr) { OneStringBuffer buffer =NewStringBuffer (); ABuffer.append ("["); -          for(inti = 0; i < arr.length; i++) { -             if(i = = Arr.length-1) { theBuffer.append (Arr[i]). Append ("]"); -}Else { -Buffer.append (Arr[i]). Append (","); -             } +         } -          +         returnbuffer.tostring (); A     } at      -}

Java StringBuffer Class