Java does not have a datatype for unsigned integers. You can define a long instead of an int if you need to store large values. You can also use a signed integer as if it were unsigned. The benefit of two’s complement representation is that most operations (such as addition, subtraction, multiplication, and left shift) are identical on a binary level for … Read more
I created local database in DB2 called “TestDB” then I created table called “TestTable“.I found that the table is put under schema name is “yasmin“.I am trying to connect to the DB2 database using JDBC but I got this exception I tried many solutions on the internet Like set schema but unfortunately doesn’t work. This is the JDBC code … Read more
I was wondering what the best way of printing a 2D array was. This is some code that I have and I was just wondering if this is good practice or not. Also correct me in any other mistakes I made in this code if you find any. Thanks!
I doubt that the second attempt (import java.util.stream;) works. As JonSkeet pointed out in their comment, it should result in a compilation error: error: cannot find symbol. Maybe you wanted to import java.util.stream.*;? To the actual question: If we import with a wildcard, that is the asterisk (*) character, only the direct classes in this package will be imported, not the … Read more
I have the following JSON text. How can I parse it to get the values of pageName, pagePic, post_id, etc.?
The scanner can also use delimiters other than whitespace. Easy example from Scanner API: The point is to understand the regular expressions (regex) inside the Scanner::useDelimiter. Find an useDelimiter tutorial here. To start with regular expressions here you can find a nice tutorial. Notes
What the exception is really saying is that there is no known server with the name “local”. My guess is that you’re trying to connect to your local computer. Try with the hostname “localhost” instead, or perhaps 127.0.0.1 or ::1 (the last one is IPv6). From the javadocs: Thrown to indicate that the IP address of a host could not be determined. … Read more
The handshake failure could have occurred due to various reasons: Incompatible cipher suites in use by the client and the server. This would require the client to use (or enable) a cipher suite that is supported by the server. Incompatible versions of SSL in use (the server might accept only TLS v1, while the client … Read more
No you can’t change the size of an array once created. You either have to allocate it bigger than you think you’ll need or accept the overhead of having to reallocate it needs to grow in size. When it does you’ll have to allocate a new one and copy the data from the old to … Read more
Check intent is null or not before you get data example In ClassA: In ClassB: