Computer Applications

Predict the output.

int res = Integer.valueOf("100").compareTo(new Integer(100)); 
System.out.println(res);

Java

Java Library Classes

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Answer

Working

Here, Integer.valueOf("100") returns an Integer object storing 100 and new Integer(100) creates a new Integer object with the value 100.

Integer.compareTo() compares two Integer objects numerically, after auto-unboxing is performed by the compiler and the Integer objects are converted to integer type values. The function compareTo() returns 0 as primitive values of both the objects are equal.

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Find the error:

Integer obj = new Integer("A"); 
System.out.println(obj);

View Answer

Find the error :

double n2 = Double.parseDouble("2"); 
double n3 = Double.parseDouble("OCA"); 
System.out.println(n2 + " " + n3);