【JAVA】this和super关键字的用法
一、this关键字的用法
（1）引用隐式参数
在类的构造器中如果实例域名与显示参数名相同时，可以用this引用隐式参数以区分开。如下这段代码
class Employee{ public Employee(String n, double s, int year, int month, int day) { name = n; salary = s; GregorianCalendar calendar = new GregorianCalendar(year, month - 1, day); // GregorianCalendar uses 0 for January hireDay = calendar.getTime(); } public String getName() { return name; } public double getSalary() { return salary; } public Date getHireDay() { return hireDay; } public void raiseSalary(double byPercent) { double raise = salary * byPercent / 100; salary += raise; } private String name; private double salary; private Date hireDay;}class Manager extends Employee{ /** @param n the employee's name @param s the salary @param year the hire year @param month the hire month @param day the hire day */ public Manager(String n, double s, int year, int month, int day) { super(n, s, year, month, day); bonus = 0; } public double getSalary() { double baseSalary = super.getSalary(); return baseSalary + bonus; } public void setBonus(double b) { bonus = b; } private double bonus;}
