 pangyaxuan
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917df9e6be
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上传文件至 'project'
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3 weeks ago |
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pangyaxuan
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b4225a1955
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上传文件至 'W11'
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3 weeks ago |
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pangyaxuan
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a568afa8e7
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删除 'W11.zip'
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3 weeks ago |
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pangyaxuan
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297f93936c
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上传文件至 ''
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3 weeks ago |
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pangyaxuan
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e46305d18f
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上传文件至 'W10'
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3 weeks ago |
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pangyaxuan
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2ac3083b2b
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上传文件至 'W9'
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1 month ago |
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pangyaxuan
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181380c23f
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上传文件至 'W8'
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1 month ago |
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pangyaxuan
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4eb1bb3ec6
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上传文件至 'W7'
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2 months ago |
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pangyaxuan
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e62fe1ebb8
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删除 '屏幕截图 2026-03-08 225727.png'
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2 months ago |
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pangyaxuan
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e2d2e409bb
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删除 '屏幕截图 2026-04-27 101911.png'
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2 months ago |
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pangyaxuan
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738faa7509
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上传文件至 ''
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2 months ago |
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pangyaxuan
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ae2da4126a
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添加 'W6'
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2 months ago |
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pangyaxuan
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85717058d7
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上传文件至 'W5'
package w5;
// 基础题：Shape类及其子类
abstract class Shape {
public abstract void draw();
}
class Circle extends Shape {
private double r;
public Circle(double r) {
this.r = r;
}
@Override
public void draw() {
System.out.println("绘制圆形，半径：" + r);
}
}
class Rectangle extends Shape {
private double width;
private double height;
public Rectangle(double width, double height) {
this.width = width;
this.height = height;
}
@Override
public void draw() {
System.out.println("绘制矩形，宽：" + width + "，高：" + height);
}
}
// 工具类
class ShapeUtil {
public static void drawShape(Shape s) {
s.draw();
}
}
// 主类
public class PolymorphismDemo {
public static void main(String[] args) {
System.out.println("=== 基础题测试 ===");
// 测试Shape类
Shape circle = new Circle(5);
Shape rectangle = new Rectangle(4, 6);
ShapeUtil.drawShape(circle);
ShapeUtil.drawShape(rectangle);
}
}
1. 任务拆解与思路辅助
（1）基础题：Shape 类与多态实现
核心思路拆解：
抽象父类Shape：定义抽象方法draw()，体现封装思想，统一图形绘制接口。
子类Circle、Rectangle：继承Shape并重写draw()，实现多态的核心前提（子类重写父类方法）。
通用方法drawShape(Shape s)：利用父类引用指向子类对象的多态特性，统一调用不同图形的draw()方法。
关键语法提示：
抽象方法定义需加abstract，抽象类不能实例化；
子类重写方法需保证方法名、参数列表、返回值与父类完全一致，且访问权限不能更严格。
逻辑校验建议：先设计类的继承结构，再思考如何通过多态实现统一调用，避免一开始直接写代码
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2 months ago |
|
pangyaxuan
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96f7a59f0a
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上传文件至 ''
package w5;
// 基础题：Shape类及其子类
abstract class Shape {
public abstract void draw();
}
class Circle extends Shape {
private double r;
public Circle(double r) {
this.r = r;
}
@Override
public void draw() {
System.out.println("绘制圆形，半径：" + r);
}
}
class Rectangle extends Shape {
private double width;
private double height;
public Rectangle(double width, double height) {
this.width = width;
this.height = height;
}
@Override
public void draw() {
System.out.println("绘制矩形，宽：" + width + "，高：" + height);
}
}
// 工具类
class ShapeUtil {
public static void drawShape(Shape s) {
s.draw();
}
}
// 主类
public class PolymorphismDemo {
public static void main(String[] args) {
System.out.println("=== 基础题测试 ===");
// 测试Shape类
Shape circle = new Circle(5);
Shape rectangle = new Rectangle(4, 6);
ShapeUtil.drawShape(circle);
ShapeUtil.drawShape(rectangle);
}
}
1. 任务拆解与思路辅助
（1）基础题：Shape 类与多态实现
核心思路拆解：
抽象父类Shape：定义抽象方法draw()，体现封装思想，统一图形绘制接口。
子类Circle、Rectangle：继承Shape并重写draw()，实现多态的核心前提（子类重写父类方法）。
通用方法drawShape(Shape s)：利用父类引用指向子类对象的多态特性，统一调用不同图形的draw()方法。
关键语法提示：
抽象方法定义需加abstract，抽象类不能实例化；
子类重写方法需保证方法名、参数列表、返回值与父类完全一致，且访问权限不能更严格。
逻辑校验建议：先设计类的继承结构，再思考如何通过多态实现统一调用，避免一开始直接写代码。
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2 months ago |
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pangyaxuan
|
152000b376
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删除 'W5(2)/屏幕截图 2026-04-06 201413.png'
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2 months ago |
|
pangyaxuan
|
c46c70540f
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删除 'W5/屏幕截图 2026-04-06 201413.png'
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2 months ago |
|
pangyaxuan
|
8a75d6c21b
|
上传文件至 'W5(2)'
package w5;
// 基础题：Shape类及其子类
abstract class Shape {
public abstract void draw();
}
class Circle extends Shape {
private double r;
public Circle(double r) {
this.r = r;
}
@Override
public void draw() {
System.out.println("绘制圆形，半径：" + r);
}
}
class Rectangle extends Shape {
private double width;
private double height;
public Rectangle(double width, double height) {
this.width = width;
this.height = height;
}
@Override
public void draw() {
System.out.println("绘制矩形，宽：" + width + "，高：" + height);
}
}
// 工具类
class ShapeUtil {
public static void drawShape(Shape s) {
s.draw();
}
}
// 主类
public class PolymorphismDemo {
public static void main(String[] args) {
System.out.println("=== 基础题测试 ===");
// 测试Shape类
Shape circle = new Circle(5);
Shape rectangle = new Rectangle(4, 6);
ShapeUtil.drawShape(circle);
ShapeUtil.drawShape(rectangle);
}
}
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2 months ago |
|
pangyaxuan
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76f43bdf17
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上传文件至 'W5'
package w5;
// 基础题：Shape类及其子类
abstract class Shape {
public abstract void draw();
}
class Circle extends Shape {
private double r;
public Circle(double r) {
this.r = r;
}
@Override
public void draw() {
System.out.println("绘制圆形，半径：" + r);
}
}
class Rectangle extends Shape {
private double width;
private double height;
public Rectangle(double width, double height) {
this.width = width;
this.height = height;
}
@Override
public void draw() {
System.out.println("绘制矩形，宽：" + width + "，高：" + height);
}
}
// 工具类
class ShapeUtil {
public static void drawShape(Shape s) {
s.draw();
}
}
// 主类
public class PolymorphismDemo {
public static void main(String[] args) {
System.out.println("=== 基础题测试 ===");
// 测试Shape类
Shape circle = new Circle(5);
Shape rectangle = new Rectangle(4, 6);
ShapeUtil.drawShape(circle);
ShapeUtil.drawShape(rectangle);
}
}
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2 months ago |
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pangyaxuan
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309d1bc0a9
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Merge pull request '删除 'W5/NeteaseCommentCrawler.java'' (#4) from delete-w5-file into main
Reviewed-on: #4
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2 months ago |
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pangyaxuan
|
8a87c62002
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删除 'W5/NeteaseCommentCrawler.java'
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2 months ago |
|
pangyaxuan
|
92e49b2f14
|
上传文件至 'W5'
package w5;
// 基础题：Shape类及其子类
abstract class Shape {
public abstract void draw();
}
class Circle extends Shape {
private double r;
public Circle(double r) {
this.r = r;
}
@Override
public void draw() {
System.out.println("绘制圆形，半径：" + r);
}
}
class Rectangle extends Shape {
private double width;
private double height;
public Rectangle(double width, double height) {
this.width = width;
this.height = height;
}
@Override
public void draw() {
System.out.println("绘制矩形，宽：" + width + "，高：" + height);
}
}
// 工具类
class ShapeUtil {
public static void drawShape(Shape s) {
s.draw();
}
}
// 主类
public class PolymorphismDemo {
public static void main(String[] args) {
System.out.println("=== 基础题测试 ===");
// 测试Shape类
Shape circle = new Circle(5);
Shape rectangle = new Rectangle(4, 6);
ShapeUtil.drawShape(circle);
ShapeUtil.drawShape(rectangle);
}
}
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2 months ago |
|
pangyaxuan
|
d01244e8e8
|
上传文件至 'W4'
// 抽象图形类
abstract class Shape {
public abstract double getArea();
}
// 圆形
class Circle extends Shape {
private double r;
public Circle(double r) {
this.r = r;
}
@Override
public double getArea() {
return Math.PI * r * r;
}
}
// 矩形
class Rectangle extends Shape {
private double width;
private double height;
public Rectangle(double width, double height) {
this.width = width;
this.height = height;
}
@Override
public double getArea() {
return width * height;
}
}
// 三角形
class Triangle extends Shape {
private double base;
private double height;
public Triangle(double base, double height) {
this.base = base;
this.height = height;
}
@Override
public double getArea() {
return 0.5 * base * height;
}
}
// 工具类
class ShapeUtil {
public static void printArea(Shape shape) {
System.out.println("面积：" + shape.getArea());
}
}
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3 months ago |
|
pangyaxuan
|
63e1ed4f7c
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删除 'W4'
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3 months ago |
|
pangyaxuan
|
2b616b1f2d
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添加 'W4'
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3 months ago |
|
pangyaxuan
|
5c46764251
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添加 'W3'
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3 months ago |
|
pangyaxuan
|
2427675ea3
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添加 'W2'
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3 months ago |
|
pangyaxuan
|
1d1ed1a611
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上传文件至 ''
|
3 months ago |
|
pangyaxuan
|
b1475a7060
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删除 '屏幕截图 2026-03-09 003508.png'
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3 months ago |
|
pangyaxuan
|
877089d100
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删除 'TemperatureConverter.java'
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3 months ago |
|
pangyaxuan
|
7b79b578f3
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删除 'README.'
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3 months ago |
|
pangyaxuan
|
5f47745086
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添加 'README.'
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3 months ago |
|
pangyaxuan
|
d8e0055ddc
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上传文件至 ''
|
3 months ago |
|
pangyaxuan
|
046af68582
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添加 'TemperatureConverter.java'
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3 months ago |
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pangyaxuan
|
b058787b27
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添加 'hello wo r l d'
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3 months ago |
 hewh
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3bebb701fa
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Initial commit
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4 months ago |
