九九乘法表

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已于 2023-12-26 15:46:45 修改

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分类专栏： java 文章标签：排序算法

于 2013-09-04 15:12:46 首次发布

本文链接：https://blog.youkuaiyun.com/dongjing991/article/details/11061359

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本文展示了如何使用Java实现九九乘法表和多种几何图形，包括矩形、圆形、椭圆和多边形。

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打印各种*号的形排列状，都是类似的方法，下面打印一个九九乘法表。代码如下：

一、九九乘法表

public class ChengFa {

public static void main(String[] args) {

   for (int i = 1; i < 10; i++) {
   for (int j = 1; j <= i; j++) {

    System.out.print(j+"x"+i+"="+j*i+" ");
   }
   System.out.println();

   }

}

}

public class ChengFa {
 
   public static void main(String[] args) {
  
    for (int i = 1; i < 10; i++) {
    for (int j = 1; j <= i; j++) {
     
    System.out.print(j+"x"+i+"="+j*i+" ");
    }
   System.out.println();
   
   }
  
 }

}

二、java实现各种几何图形和代码实现

1、矩形

import java.awt.geom.Rectangle2D; public class RectangleExample { public static void main(String[] args) { Rectangle2D rect = new Rectangle2D.Double(10, 20, 30, 40); System.out.println("Rectangle: " + rect); } }

import java.awt.geom.Rectangle2D;  
  
public class RectangleExample {  
    public static void main(String[] args) {  
        Rectangle2D rect = new Rectangle2D.Double(10, 20, 30, 40);  
        System.out.println("Rectangle: " + rect);  
    }  
}

2、圆形

import java.awt.geom.Ellipse2D; public class CircleExample { public static void main(String[] args) { Ellipse2D circle = new Ellipse2D.Double(10, 20, 30, 40); System.out.println("Circle: " + circle); } }

import java.awt.geom.Ellipse2D;  
  
public class CircleExample {  
    public static void main(String[] args) {  
        Ellipse2D circle = new Ellipse2D.Double(10, 20, 30, 40);  
        System.out.println("Circle: " + circle);  
    }  
}

3、椭圆

import java.awt.geom.Ellipse2D; public class EllipseExample { public static void main(String[] args) { Ellipse2D ellipse = new Ellipse2D.Double(10, 20, 30, 40); System.out.println("Ellipse: " + ellipse); } }

import java.awt.geom.Ellipse2D;  
  
public class EllipseExample {  
    public static void main(String[] args) {  
        Ellipse2D ellipse = new Ellipse2D.Double(10, 20, 30, 40);  
        System.out.println("Ellipse: " + ellipse);  
    }  
}

4、多边形

import java.awt.geom.Polygon; public class PolygonExample { public static void main(String[] args) { int[] xPoints = {10, 20, 30, 40}; int[] yPoints = {10, 20, 30, 40}; Polygon polygon = new Polygon(xPoints, yPoints, xPoints.length); System.out.println("Polygon: " + polygon); } }

import java.awt.geom.Polygon;  
  
public class PolygonExample {  
    public static void main(String[] args) {  
        int[] xPoints = {10, 20, 30, 40};  
        int[] yPoints = {10, 20, 30, 40};  
        Polygon polygon = new Polygon(xPoints, yPoints, xPoints.length);  
        System.out.println("Polygon: " + polygon);  
    }  
}