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I've been trying to find the meaning of returning == from a method. But I'm not sure what its called so I can't find any explanations online. If someone could point me to the correct resources or the name so I can search it that would be great. This is an example of what I don't understand.
public boolean isFull()
{
return length == entry.length;
}
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In Java, return is a reserved keyword i.e, we can't use it as an identifier. It is used to exit from a method, with or without a value. Usage of return keyword as there exist two ways as listed below as follows: Case 1: Methods returning a value. Case 2: Methods not returning a value.
Returning a Value from a Method In Java, every method is declared with a return type such as int, float, double, string, etc. These return types required a return statement at the end of the method. A return keyword is used for returning the resulted value. The void return type doesn't require any return statement.
Your method has no return type, Provide a return type of int in your method. And return -1 means nothing in java, you are just returning a int value, thats it.
The doubleValue() method of Java Double class returns the double value of this Double object.
length == entry.length is just a boolean expression. This is the same as:
public boolean isFull() {
boolean answer = (length == entry.length);
return answer;
}
The form you quoted is more succinct, and generally preferred.
93
If length is equal to entry.length, this returns true. Otherwise, it returns false.
This is just evaluating the expression length == entry.length and returning the result of that expression.
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