This question already has answers here:
Why isn't there a java.lang.Array class? If a java array is an Object, shouldn't it extend Object?
(4 answers)
Closed 3 years ago.
I would like to know what is the base class for byte array (byte[]) in java. For example for String it is java.lang.String.
The answer is byte[].class.
Example:
byte[] receivedMessage = consumer.receiveBody(byte[].class, 15000); // in ms or 15 seconds
Related
This question already has answers here:
How to create a generic array in Java?
(32 answers)
Closed 1 year ago.
class car<T>{
car<T>[] name;
name=(car<T>[]) new Object[5];
}
I tried to create an array of the class but the declare seem wrong. how should I set length of the array to 5 here?
Use java.lang.reflect.Array#newInstance:
car<T>[] name = (car<T>[]) java.lang.reflect.Array.newInstance(car.class, 5);
This question already has answers here:
Fastest way to set all values of an array?
(14 answers)
How do I declare and initialize an array in Java?
(31 answers)
Closed 2 years ago.
I have a byte array I want to set to a set X amount of bytes, but I want to initialize it first then assign bytes to it later, index by index.
What should I do? So far I've been just creating a byte array of X bytes, all just filled with FF to make things simple but I feel like this is not the best way.
Thanks
edit: Would the best way just be
byte[] bArr = new byte[X];
??
This question already has answers here:
How to convert byte[] to Byte[] and the other way around?
(9 answers)
Closed 3 years ago.
I want to convert a Byte array into a byte array, but I don't see any way to do so in java without using a loop.
Can someone please tell me a way to make it ?
There is no need for that, because Java has an auto-unboxing system that automatically converts Bytes to bytes. So, you can use them the same way. But if you really have to, you have to use a loop.
This question already has answers here:
Converting 'ArrayList<String> to 'String[]' in Java
(17 answers)
Closed 3 years ago.
I am trying to initialize an array object with a get method which returns an arraylist object. I have tried using .toArray() to convert but it didn't work.
Would Project[] projects = list.toArray(new Project[[0]]) work? The reason it doesn't work normally is because by default toArray returns an Object[], and the JVM is unable to cast that to a Project[]. Passing in the project array allows it to determine the type of the desired array.
This question already has answers here:
Java Serializable Object to Byte Array
(12 answers)
Closed 8 years ago.
I have requirement where i want to store Hash Set i have to byte[] in database. I have searched through internet haven't found a solution.
I have following hashset of custom class.
HashSet<MyClass> set = new HashSet<MyClass>();
Please help.
You can serialize it, if the stored data is serializable. Then convert to bytes.