StringBuilder and StringBuffer in Java - Interactive Code Practice

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Practice - 5 Tasks

1fill in blank

easy

Complete the code to create a new StringBuilder object.

Java

StringBuilder sb = new [1]();

🎯 Drag options to blanks, or click blank then click option

AStringBuilder

BStringBuffer

CString

DStringBuilderBuffer

Attempts:

3 left

2fill in blank

medium

Complete the code to append the string "Hello" to the StringBuffer object.

Java

StringBuffer sb = new StringBuffer();
sb.[1]("Hello");

🎯 Drag options to blanks, or click blank then click option

Ainsert

Badd

Cconcat

Dappend

Attempts:

3 left

3fill in blank

hard

Fix the error in the code to convert StringBuilder to String.

Java

StringBuilder sb = new StringBuilder();
sb.append("Test");
String result = sb.[1]();

🎯 Drag options to blanks, or click blank then click option

Astring

BtoString

Cconvert

DtoStr

Attempts:

3 left

4fill in blank

hard

Fill both blanks to create a StringBuffer, append "Hi", and convert to String.

Java

StringBuffer sb = new [1]();
sb.[2]("Hi");
String s = sb.toString();

🎯 Drag options to blanks, or click blank then click option

AStringBuffer

BStringBuilder

Cappend

Dinsert

Attempts:

3 left

5fill in blank

hard

Fill all three blanks to create a StringBuilder, append "Bye", and convert to String.

Java

StringBuilder [1] = new StringBuilder();
[1].[2]("Bye");
String result = [1].[3]();

🎯 Drag options to blanks, or click blank then click option

Asb

Bappend

CtoString

Dbuffer

Attempts:

3 left