Common wrapper methods in Java - Interactive Code Practice

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Practice - 5 Tasks

1fill in blank

easy

Complete the code to convert the string "123" to an integer using a wrapper method.

Java

int number = Integer.[1]("123");

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AparseInt

BvalueOf

CtoString

DintValue

Attempts:

3 left

2fill in blank

medium

Complete the code to convert the integer 456 to a string using a wrapper method.

Java

String text = Integer.[1](456);

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AvalueOf

BtoString

CparseInt

DintValue

Attempts:

3 left

3fill in blank

hard

Fix the error in the code to convert the string "true" to a boolean value.

Java

boolean flag = Boolean.[1]("true");

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AtoString

BparseBoolean

CvalueOf

DbooleanValue

Attempts:

3 left

4fill in blank

hard

Fill both blanks to create a Double object from a string and get its primitive double value.

Java

Double d = new Double("3.14");
double value = d.[1](); // get primitive
boolean check = Double.[2]("3.14") > 3.0;

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

AdoubleValue

BparseDouble

CvalueOf

DtoString

Attempts:

3 left

5fill in blank

hard

Fill all three blanks to convert a string to an Integer object, get its int value, and convert it back to string.

Java

Integer obj = Integer.[1]("789");
int num = obj.[2]();
String str = Integer.[3](num);

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

AvalueOf

BintValue

CtoString

DparseInt

Attempts:

3 left