本文深入探讨了Java中的一些关键概念，包括Math.random()函数的使用范围、equals方法的行为特性、整型变量在布尔比较中的应用、对象的生命周期管理、值传递的本质、静态方法调用非静态方法的条件等。此外，还讨论了Java中不推荐使用的goto语句及类型转换的相关内容。
Math.random() [0,1]
Equals compare reference not value , you have to define your own method.
Integer can be use in Boolean compare
Object won’t be deleted , it can be used in next time . until GC think it should collect it .
Pass value is pass reference.
No sizeof because it is portable
Has goto but is not recommended
Upcast and downcast( template)
Whole scope is not allowed in Java
Static method can call non-static method
But if there is reference of an object in static method , it can call non-static method
Math.random() [0,1]
Equals compare reference not value , you have to define your own method.
Integer can be use in Boolean compare
Object won’t be deleted , it can be used in next time . until GC think it should collect it .
Pass value is pass reference.
No sizeof because it is portable
Has goto but is not recommended
Upcast and downcast( template)
Whole scope is not allowed in Java
Static method can call non-static method
But if there is reference of an object in static method , it can call non-static method
扫一扫
537
被折叠的 条评论
为什么被折叠?
到【灌水乐园】发言
