java中的实例变量

public class Employee{
	   public String name;//公共变量，对子类可见
	   private double salary;//私有变量，仅在该类可见
	   public Employee (String empName){
	      name = empName;//在构造器中对name赋值
	   }
	   public void setSalary(double empSal){
	      salary = empSal;//设定salary的值
	   }  
	   public void printEmp(){
	      System.out.println("名字 : " + name );
	      System.out.println("薪水 : " + salary);
	   }
	 
	   public static void main(String[] args){
	      Employee empOne = new Employee("Tom");
	      empOne.setSalary(1000);
	      empOne.printEmp();
	   }
	}

编译并运行，结果如下

名字 : Tom
薪水 : 1000.0