局部变量:
age是一个局部变量。定义在pubAge()方法中,它的作用域就限制在这个方法中。
public class Test{
public void pupAge(){
int age = 0; /*age必须初始化不然报错*/
age = age + 7;
System.out.println("Puppy age is :" + age);
}
public static void main(String args[]){
Test test = new Test();
test.pupAge();
}
}
//运行结果:Puppy age is 7
成员变量:
import java.io.*;
public class Employee{
// 这个成员变量对子类可见
public String name;
// 私有变量,仅在该类可见
private double salary;
//在构造器中对name赋值
public Employee(String empName){
name = empName;
}
//设定salary的值
public void setSalary(double empSal){
salary = empSal;
}
// 打印信息
public void printEmp(){
System.out.println("name : " + name);
System.out.println("salary :" + salary);
}
public static void main(String args[]){
Employee empOne = new Employee("Ransika");
empOne.setSalary(1000);
empOne.printEmp();
}
}
运行结果:name : Ransika
salary :1000.0
类变量(静态变量):
import java.io.*;
public class Employee1{
//salary是静态的私有变量
private static double salary;
// DEPARTMENT是一个常量
public static final String DEPARTEMENT = "Development";
public static void main(String args[]){
salary = 1000;
System.out.println(DEPARTEMENT+"average salary:"+salary);
}
}
运行结果:
Development average salary:1000
遇到的问题,java编译错误:解析时已到达文件结尾?
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