I am creating a bank account program for my java class that is suppose to manage up to 5 different bank accounts. The program has to allow the creation of a new account, which I have done, allow deposit and withdraw, which is also done, the 2 parts I cannot get to work are 1: … Read more
Since strings are immutable, both versions are safe. The latter, however, is less efficient (it creates an extra object and in some cases copies the character data). With this in mind, the first version should be preferred.
You need to escape the backslashes used in your path.
int is a primitive, null is not a value that it can take on. You could change the method return type to return java.lang.Integer and then you can return null, and existing code that returns int will get autoboxed. Nulls are assigned only to reference types, it means the reference doesn’t point to anything. Primitives are not reference … Read more
You ran into multiple problems here. Problem 1 : Look carefully your ; ends your switch there right away. Apparently all your case statements became orphans 🙂 Problem 2 : Your Switch should be switch(lower case s) Problem 3 : One more ; cause you compile time error at the line Note: I strongly suggest you to use an IDE, to save lot of time here. It … Read more
You need to use return value of replaceAll() method. replaceAll() does not replace the characters in the current string, it returns a new string with replacement. String objects are immutable, their values cannot be changed after they are created. You may use replace() instead of replaceAll() if you don’t need regex. outputs
It’s simply too big for an int (which is 4 bytes and signed). Use
Here you can use my method for generating Random String The above method from my bag using to generate a salt string for login purpose.
Go to File > Settings > Build, Execution, Deployment > Compiler > Java Compiler If on a Mac, it’s under Intellij IDEA > Preferences… > Build, Execution, Deployment > Java Compiler Change Target bytecode version to 1.8 of the module that you are working for. If you are using Maven Add the compiler plugin to pom.xml under the top-level project node: (Hoisted from the comments.) Note: … Read more
Wow, a lot of big OOP terms being thrown around to this guy. Being one who started in procedural programming and is now mostly doing OOP, this is conceptually how I think of the difference (without all the big terms): In C, you have things called structs that can hold state. They kind of seem … Read more