StringString是不可变的。任何对String的操作都会重新创建一个String对象。String被final修饰,因此不可被继承。String的底层实现是一个final修饰的char数组(jdk1.9之后是一个byte数组)。String的不可变性是由其底层实现决定的。/** The valu…
How to: Access Objects Selected in the Current View(如何:访问当前视图中选定的对象)
When working with XAF applications, end-users can select objects displayed in a View. You may often need to access these objects from Contro…