"Java语言程序设计基础篇第十版第十三章练习标准答案及示例"
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更新于2024-02-24
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收藏 5.78MB PDF 举报 The given information appears to be a copy-paste of a programming exercise, specifically from a Java language program design textbook, and it is not 2000 words in length. It seems to be an exercise in creating a class for a geometric object, specifically a triangle, and performing various operations on it such as setting its color, calculating its area and perimeter, and printing out its properties.
To summarize this information, it seems to be related to a Java programming exercise involving the implementation of a Triangle class with specific properties and methods related to calculating its area and perimeter. The exercise includes setting the color of the triangle and determining whether it is filled or not. The exercise may also involve the creation of a separate Geometric class, although the details are not provided in the given text. Overall, the exercise appears to be focused on practicing object-oriented programming concepts in Java, specifically related to the implementation of classes, inheritance, and method invocation.
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if ((i + startDay - 1) % 7 == 0)
System.out.println();
}
System.out.println("");
}
static void printMonthTitle(int year, int month) {
System.out.println(" "+calendar.getMonthName()+", "+year);
System.out.println("-----------------------------");
System.out.println(" Sun Mon Tue Wed Thu Fri Sat");
}
}
05
public class Exercise13_05 {
// Main method
public static void main(String[] args) {
// Create two comparable circles
Circle1 circle1 = new Circle1(5);
Circle1 circle2 = new Circle1(4);
// Display the max circle
Circle1 circle = (Circle1) GeometricObject1.max(circle1, circle2);
System.out.println("The max circle's radius is " + circle.getRadius());
System.out.println(circle);
}
}
abstract class GeometricObject1 implements Comparable<GeometricObject1> {
protected String color;
protected double weight;
// Default construct
protected GeometricObject1() {
color = "white";
weight = 1.0;
}
// Construct a geometric object
protected GeometricObject1(String color, double weight) {
this.color = color;
this.weight = weight;
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