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Converting Strings to Numeric Primitive Data Types
To convert a string which is containing digits to a primitive data type, wrapper classes can help. parseXxx method can be used to convert a String to corresponding primitive data type.
String value = "532";
int d = Integer.parseInt(value);
String value = "3.14e6";
double d = Double.parseDouble(value);
The hashCode() and equals() methods have to be very important, when objects implementing these two functions are added to collections. If not implemented or implemented incorre
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How can we define the difference between the Boolean & operator and the && operator ?
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