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Paint job category are the following (1) Q code
/**
- Abstract graphics classes
- @author Ningyi Jian
*/
public abstract class Figure {
private String brushColor;
private boolean fill;
public Figure(){
}
public Figure(String brushColor,boolean fill){
this.brushColor=brushColor;
this.fill = fill;
}
public String getBrushColor() {
return brushColor;
}
public void setBrushColor(String brushColor) {
this.brushColor = brushColor;
}
public boolean isFill() {
return fill;
}
public void setFill(boolean fill) {
this.fill = fill;
}
public abstract double getArea();
public abstract double getPerimeter();
public abstract String toString();
}
/**
- Round classes
- @author Ningyi Jian
*/
public class Circle extends Figure{
private double radius;
public Circle(){
}
public Circle(String brushColor,boolean fill,double radius){
super(brushColor, fill);
this.radius=radius;
}
public double getArea() {
double area = 3.14*radius*radius;
return area;
}
public double getPerimeter() {
double perimerter = 3.14*2*radius;
return perimerter;
}
@Override
public String toString() {
if(isFill()==true){
return "这个圆是"+getBrushColor()+"、"+"有填充"+"、"+"半径为"+radius+"的圆形";
}else{
return "这个圆是"+getBrushColor()+"、"+"无填充"+"、"+"半径为"+radius+"的圆形";
}
}
}
/**
- Square class
- @author Ningyi Jian
*/
public class Square extends Figure{
private double length;
public Square() {
}
public Square(String brushColor,boolean fill,double length){
super(brushColor, fill);
this.length = length;
}
public double getArea() {
double area = length*length;
return area;
}
public double getPerimeter() {
double perimerter = 4*length;
return perimerter;
}
public String toString() {
if(isFill()==true){
return "这个正方形是"+getBrushColor()+"、"+"有填充"+"、"+"边长为"+length+"的正方形";
}else{
return "这个正方形是"+getBrushColor()+"、"+"无填充"+"、"+"边长为"+length+"的正方形";
}
}
}
/**
- Rectangle class
- @author Ningyi Jian
*/
public class Rectangle extends Figure{
private double width;
private double height;
public Rectangle(){
}
public Rectangle(String brushColor,boolean fill,double width,double height){
super(brushColor, fill);
this.width=width;
this.height=height;
}
public double getArea() {
double area = width*height;
return area;
}
public double getPerimeter() {
double perimerter = 2*(width+height);
return perimerter;
}
public String toString() {
if(isFill()==true){
return "这个长方形是"+getBrushColor()+"、"+"有填充"+"、"+"宽为"+width+"、"+"高为"+height+"的正方形";
}else{
return "这个长方形是"+getBrushColor()+"、"+"无填充"+"、"+"宽为"+width+"、"+"高为"+height+"的正方形";
}
}
}
/**
- Sketchpad class test
- @author Ningyi Jian
*/
public class DrawingBoard {
public static void main(String[] args) {
Figure circle = new Circle("绿色", true, 3.6);
System.out.println("圆的面积为"+circle.getArea()+" "+"圆的周长为"+circle.getPerimeter()+" "+circle.toString());
Figure square = new Square("蓝色", false, 5);
System.out.println("正方形的面积为"+square.getArea()+" "+"正方形的周长为"+square.getPerimeter()+" "+square.toString());
Figure rectangle = new Rectangle("黄色", true, 5, 6);
System.out.println("长方形的面积为"+rectangle.getArea()+" "+"长方形的周长为"+rectangle.getPerimeter()+" "+rectangle.toString());
}
}
The following is the first (2) Q code
/ **
design Comparable interface, interface design the compareTo () method,
for comparison. This method is designed as a return value of type int.
This method takes a parameter of type of pattern class.
* /
public interface Comparable {
public int compareTo(Figure figure);
}
/**
- CompareTo implemented in the graphical class () method is used to compare two graphic area size
- @author Ningyi Jian
*/
public abstract class Figure implements Comparable{
private String brushColor;
private boolean fill;
public Figure(){
}
public Figure(String brushColor,boolean fill){
this.brushColor=brushColor;
this.fill = fill;
}
public String getBrushColor() {
return brushColor;
}
public void setBrushColor(String brushColor) {
this.brushColor = brushColor;
}
public boolean isFill() {
return fill;
}
public void setFill(boolean fill) {
this.fill = fill;
}
public abstract double getArea();
public abstract double getPerimeter();
public abstract String toString();
public int compareTo(Figure figure){
if(figure instanceof Figure){
Figure f = (Figure)figure;
if(this.getArea()>f.getArea()){
return 1;
}else if(this.getArea()<f.getArea()){
return -1;
}else {
return 0;
}
}
return 0;
}
}
/**
- Round classes
- @author Ningyi Jian
*/
public class Circle extends Figure{
private double radius;
public Circle(){
}
public Circle(String brushColor,boolean fill,double radius){
super(brushColor, fill);
this.radius=radius;
}
public double getArea() {
double area = 3.14*radius*radius;
return area;
}
public double getPerimeter() {
double perimerter = 3.14*2*radius;
return perimerter;
}
@Override
public String toString() {
if(isFill()==true){
return "这个圆是"+getBrushColor()+"、"+"有填充"+"、"+"半径为"+radius+"的圆形";
}else{
return "这个圆是"+getBrushColor()+"、"+"无填充"+"、"+"半径为"+radius+"的圆形";
}
}
}
/**
- Square class
- @author Ningyi Jian
*/
public class Square extends Figure{
private double length;
public Square() {
}
public Square(String brushColor,boolean fill,double length){
super(brushColor, fill);
this.length = length;
}
public double getArea() {
double area = length*length;
return area;
}
public double getPerimeter() {
double perimerter = 4*length;
return perimerter;
}
public String toString() {
if(isFill()==true){
return "这个正方形是"+getBrushColor()+"、"+"有填充"+"、"+"边长为"+length+"的正方形";
}else{
return "这个正方形是"+getBrushColor()+"、"+"无填充"+"、"+"边长为"+length+"的正方形";
}
}
}
/**
- Rectangle class
- @author Ningyi Jian
*/
public class Rectangle extends Figure{
private double width;
private double height;
public Rectangle(){
}
public Rectangle(String brushColor,boolean fill,double width,double height){
super(brushColor, fill);
this.width=width;
this.height=height;
}
public double getArea() {
double area = width*height;
return area;
}
public double getPerimeter() {
double perimerter = 2*(width+height);
return perimerter;
}
public String toString() {
if(isFill()==true){
return "这个长方形是"+getBrushColor()+"、"+"有填充"+"、"+"宽为"+width+"、"+"高为"+height+"的正方形";
}else{
return "这个长方形是"+getBrushColor()+"、"+"无填充"+"、"+"宽为"+width+"、"+"高为"+height+"的正方形";
}
}
}
/**
- Sketchpad class test
- In the test class, create an array pattern class, stored in a plurality of circular array, square, rectangular objects,
- Use compareTo () method to find the maximum graphics array area.
- @author Ningyi Jian
*/
public class DrawingBoard {
public static void main(String[] args) {
Figure[] figures = new Figure[]{new Circle("绿色", true, 10),new Circle("绿色", true, 3),
new Square("蓝色", false, 5.6),new Square("蓝色", false, 9),
new Rectangle("黑色", true, 5, 6),new Rectangle("黑色", true, 25, 6)};
Figure max = figures[0];
for(int i=0;i<figures.length;i++){
int compareTo = figures[i].compareTo(max);
if(compareTo>0){
max=figures[i];
}
}
System.out.println("这些图形类中最大的面积为"+max.getArea()+" "+max);
}
}