Community driven content discussing all aspects of software development from DevOps to design patterns. Follow these steps to find the length of a String in Java: Declare a variable of type String ...

We independently review everything we recommend. When you buy through our links, we may earn a commission. Learn more› By Rose Maura Lorre Rose Maura Lorre is a writer who has reported on turkey ...

Classes and objects in Java must be initialized before they are used. You’ve previously learned that class fields are initialized to default values when classes are loaded, and that objects are ...

I've had this project work for me earlier and it still works for my colleges, but now when I try to open the app it crashes immediately on the getAccounts() part with this following stacktrace. Any ...

A Java string is a sequence of characters that exists as an object of the class java.lang. Java strings are created and manipulated through the string class. Once created, a string is immutable -- its ...

（String）是标准的类型转换，将Object类型转为String类型，使用(String)强转时，最好使用instanceof做一个类型检查，以判断是否可以进行强转，否则容易抛出ClassCastException异常。需要注意的是编写的时候，编译器并不会提示有语法错误，所以这个方法要谨慎的使用。