Chapter 12 Objectives After you have read and studied this chapter, you should be able to Describe four different object categories and use them effectively in designing classes. Define a package and place reusable classes in it. Write a method that calls the superclass's method explicitly by using the reserved word super
Chapter 11 Objectives After you have read and studied this chapter, you should be able to Include a FileDialog object in your program to let the user specify a file. Write bytes to a file and read them back from the file using FileOutputStream and FileInputStream. Write values of primitive data types to a file and read them back from the file using DataOutputStream and DataInputStream
Chapter 9 Objectives After you have read and studied this chapter you should be able to Manipulate a collection of data values using an array. Declare and use an array of primitive data types in writing a program. Declare and use an array of objects in writing a program. Describe how a two-dimensional array is implemented as an array of arrays. Manipulate a collection of objects using a vector. Use MultiInputBox object from the javabook package to input an array of strings
我们剖析事物的本质,从中形成概念,并根据需要赋予它重要性。这 切很大程度上是源于,我们所使用的语言已经在其形式中包含了一套为它 的使用者所完全接受的规范,而我们正属于接受这一规范的那群人.如果 我们拒不接受语言在数据的组织与分类方面的原则的话,那我们根本就没 法说话。” Benjamin Lee Whorf(1897-1941) 计算机革命的推动力在于机器。于是机器的发展也左右了编程语言发展
