java求解释一下代码

pane也就是JPanel 而这个panel就是JPanel的实例对象，

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.class也就是指向JPanel本身。

.getResource也就是读取文件路径。

共同交流哦

java编程 定义一个类描述公司雇员

public class Employee {

private int id;

private String name;

private double salary;

public Employee() {

this.id = 0;

this.name = null;

this.salary = 0.0;

}

public Employee(int id, String name, double salary) {

super();

this.id = id;

this.name = name;

this.salary = salary;

}

public int getId() {

return id;

}

public void setId(int id) {

this.id = id;

}

public String getName() {

return name;

}

public void setName(String name) {

this.name = name;

}

public double getSalary() {

return salary;

}

public void setSalary(double salary) {

this.salary = salary;

}

}

java程序设计，多态在工资系统中的应用。请将【代码一】到【代码六】用为Java源代码填写

代码一：

private Double weeklySalary;

代码二：

public void setWeeklySalary(Double weeklySalary){

this.weeklySalary=weeklySalary;

}

代码三：

private Double salary;

private Integer piece;

public PieceWorker (String name,Integer p,Double s) {

super(name);

setSalary(s);

setPiece(p);

}

public void setPiece(Integer p){

this.piece=p;

}

public void setSalary(Double s){

this.salary=s;

}

public double earnings() {

return piece*salary;

}

代码四：

private Double salary;

private Integer hour;

public PieceWorker (String name,Integer h,Double s) {

super(name);

setSalary(s);

setHour(h);

}

public void setHour(Integer h){

this.hour=h;

}

public void setSalary(Double s){

this.salary=s;

}

public double earnings() {

return h*salary;

}

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