Questions and Exercises: Variables问题和练习：变量

Questions问题

1. The term "instance variable" is another name for ___.术语“实例变量”是非静态字段的另一个名称。
2. The term "class variable" is another name for ___.术语“类变量”是静态字段的另一个名称。
3. A local variable stores temporary state; it is declared inside a ___.局部变量存储临时状态；它是在一个方法中声明。
4. A variable declared within the opening and closing parenthesis of a method signature is called a ____.在方法签名的左括号和右括号内声明的变量称为形参。
5. What are the eight primitive data types supported by the Java programming language?Java编程语言支持的八种基本数据类型是什么？byte、short、int、long、float、double、boolean和char
6. Character strings are represented by the class ___.字符串由类java.lang.String表示。
7. An ___ is a container object that holds a fixed number of values of a single type.数组是一个容器对象，它包含固定数量的单一类型的值。

Exercises练习

1. Create a small program that defines some fields.创建一个定义一些字段的小程序。Try creating some illegal field names and see what kind of error the compiler produces.尝试创建一些非法的字段名，看看编译器会产生什么样的错误。Use the naming rules and conventions as a guide.使用命名规则和约定作为指南。
2. In the program you created in Exercise 1, try leaving the fields uninitialized and print out their values.在练习1中创建的程序中，尝试保持字段未初始化并打印其值。Try the same with a local variable and see what kind of compiler errors you can produce.对局部变量进行同样的尝试，看看会产生什么类型的编译器错误。Becoming familiar with common compiler errors will make it easier to recognize bugs in your code.熟悉常见的编译器错误将更容易识别代码中的错误。

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