Primitive to object conversion in Java - Interactive Code Practice

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Practice - 5 Tasks

1fill in blank

easy

Complete the code to convert an int primitive to an Integer object.

Java

int num = 10;
Integer obj = [1];

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Anew Integer(num)

BInteger.valueOf(num)

Cint.valueOf(num)

DInteger.parseInt(num)

Attempts:

3 left

2fill in blank

medium

Complete the code to convert a double primitive to a Double object.

Java

double val = 5.5;
Double obj = [1];

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ADouble.parseDouble(val)

Bnew Double(val).doubleValue()

CDouble.valueOf(val)

DDouble.toString(val)

Attempts:

3 left

3fill in blank

hard

Fix the error in converting a boolean primitive to a Boolean object.

Java

boolean flag = true;
Boolean obj = [1];

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ABoolean.valueOf(flag)

BBoolean.parseBoolean(flag)

Cnew Boolean(flag).booleanValue()

DBoolean.toString(flag)

Attempts:

3 left

4fill in blank

hard

Fill both blanks to convert a char primitive to a Character object and print it.

Java

char ch = 'a';
Character obj = [1];
System.out.println([2]);

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ACharacter.valueOf(ch)

Bch

Cobj

Dnew Character(ch)

Attempts:

3 left

5fill in blank

hard

Fill all three blanks to create a Float object from a float primitive, check equality, and print the result.

Java

float f1 = 3.14f;
Float obj1 = [1];
Float obj2 = [2];
boolean isEqual = obj1.[3](obj2);
System.out.println(isEqual);

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AFloat.valueOf(f1)

Bnew Float(f1)

Cequals

DFloat.parseFloat("3.14")

Attempts:

3 left