java实验作业类的定义与描述
2024-09-01 00:13:29
1 //1三角形的定义与描述
2 package test;
3
4 public class sjx {
5 private double a,b,c;
6
7 public sjx(double a, double b, double c) {
8 this.a = a;
9 this.b = b;
10 this.c = c;
11 }
12
13 public double C(){
14 return a+b+c;
15 }
16 public double S(){
17 double p=C()*0.5;
18 double s=Math.sqrt(p*(p-a)*(p-b)*(p-c));
19 return s;
20 }
21 public void print(){
22 System.out.println(a+" "+b+" "+c+" ");
23 }
24 }
25 package test;
26
27 public class testsjx {
28
29 public static void main(String[] args) {
30 sjx sjx=new sjx(3,4,5);
31 System.out.println("三角形的三边分别为");
32 sjx.print();
33 System.out.println("三角形的周长为："+sjx.C());
34 System.out.println("三角形的面积为:"+sjx.S());
35 }
36
37 }
38 //2.圆的定义和描述
39 package test;
40
41 public class circle {
42 private double r;
43
44 public circle(double r) {
45 this.r = r;
46 }
47 public double C(){
48 return 2*r*Math.PI;
49 }
50 public double S(){
51 return Math.PI*r*r;
52 }
53 public void output(){
54 System.out.println("圆的的半径为"+r+"\n"+"圆的周长为:"+C()+"\n"+"圆的面积为:"+S());
55 }
56
57 }
58 package test;
59
60 public class testcircle {
61
62 public static void main(String[] args) {
63 circle circle=new circle(4);
64 circle.output();
65
66 }
67
68 }
69 //3.圆柱的定义和描述
70 package test;
71
72 public class yz {
73 private double r,h;
74
75 public yz(double r, double h) {
76 this.r = r;
77 this.h = h;
78 }
79 public double DC(){
80 return 2*r*Math.PI;
81 }
82 public double DS(){
83 return Math.PI*r*r;
84 }
85 public double BS(){//圆柱的表面积
86 return 2*DS()+DC()*h;
87 }
88 public double V(){//圆柱的体积
89 return DS()*h;
90 }
91 public void output(){
92 System.out.println("圆柱的的半径为"+r+"\n"+"圆柱的高为"+h+"\n"+"圆柱的表面积为:"+BS()+"\n"+"圆柱的体积为:"+V());
93 }
94 }
95 package test;
96
97 public class testyz {
98
99 public static void main(String[] args) {
100 yz yz=new yz(3,4);
101
102 yz.output();
103 }
104
105 }
106 //5.图形的定义与描述
107 package test;
108
109 public class tx {
110 private String xz;//图形的形状
111 private double dx;//图形的大小
112 private String zx;//图形的存在形式,立体or平面
113 public tx(String xz, double dx, String zx) {
114 this.xz = xz;
115 this.dx = dx;
116 this.zx = zx;
117 }
118 public void output(){
119 System.out.println("图形的形状:"+xz+"\n"+"图形的大小:"+dx+"\n"+"图形的存在形式:"+zx);
120 }
121 }
122 package test;
123
124 public class testtx {
125
126 public static void main(String[] args) {
127
128 tx tx=new tx("圆形",40,"平面");
129 tx.output();
130 }
131
132 }
133 //6计算机的定义与描述
134 package test;
135
136 public class computer {
137 private String cpu;
138 private String xk;
139 private String zb;
140 public computer(String cpu, String xk, String zb) {
141 this.cpu = cpu;
142 this.xk = xk;
143 this.zb = zb;
144 }
145 public void output(){
146 System.out.println("cpu为:"+cpu+"\n"+"显卡为:"+xk+"\n"+"主板为:"+zb);
147 }
148 }
149 package test;
150
151 import java.util.Scanner;
152
153 public class testcomputer {
154
155 public static void main(String[] args) {
156 String a,b,c;
157 Scanner in=new Scanner(System.in);
158 System.out.println("请输入计算机的cpu/显卡/和主板类型:");
159 a=in.next();
160 b=in.next();
161 c=in.next();
162 computer computer=new computer(a, b, c);
163 computer.output();
164 }
165
166 }
167 //7.课程的定义和描述
168 package test;
169
170 public class kc {
171 private String lesson;//什么课
172 private String time;//什么时候上课
173 private String teacher;//什么老师教授
174 public kc(String lesson, String time, String teacher) {
175 this.lesson = lesson;
176 this.time = time;
177 this.teacher = teacher;
178 }
179 public void output(){
180 System.out.println("课程为:"+lesson+"\n"+"老师为:"+teacher+"\n"+"上课时间为:"+time);
181 }
182 }
183 package test;
184
185 public class testkc {
186
187 public static void main(String[] args) {
188 kc kc=new kc("java程序设计", "周一下午第二节和周五上午第二节", "张老师");
189 kc.output();
190 }
191
192 }
193 //8日期的定义与描述
194 package test;
195
196 public class date {
197 private String today;//今天几号
198 private String luck;//是否为吉日
199 public date(String today, String luck) {
200 this.today = today;
201 this.luck = luck;
202 }
203 public void output(){
204 System.out.println("今天几号:"+today+"\n"+"是否为吉日:"+luck);
205 }
206 }
207 package test;
208
209 public class testdate {
210
211 public static void main(String[] args) {
212 date date=new date("2020/11/06", "是");
213 date.output();
214 }
215
216 }
217 //9文件夹的定义与描述
218 package test;
219
220 public class file {
221 private String pan;//哪个盘上的文件夹
222 private String kj;//是否为可见文件夹
223 public file(String pan, String kj) {
224 this.pan = pan;
225 this.kj = kj;
226 }
227 public void output(){
228 System.out.println("哪个盘上的文件夹:"+pan+"\n"+"是否为可见文件夹:"+kj);
229 }
230 }
231 package test;
232
233 public class testfile {
234
235 public static void main(String[] args) {
236 file file =new file("D盘", "是");
237 file.output();
238 }
239
240 }
241 //10.上课的课堂的描述
242 package test;
243
244 public class kt {
245 private String teacher;// 上课老师为
246 private String qiandao;// 是否签到
247 private String homework;// 是否留家庭作业了
248
249 public kt(String teacher, String qiandao, String homework) {
250 this.teacher = teacher;
251 this.qiandao = qiandao;
252 this.homework = homework;
253 }
254 public void output(){
255 System.out.println("上课老师为:"+teacher+"\n"+"是否签到:"+qiandao+"\n"+"是否留家庭作业了:"+homework);
256 }
257 }
258 package test;
259
260 public class testkt {
261
262 public static void main(String[] args) {
263 kt kt=new kt("张老师", "是", "没有");
264 kt.output();
265 }
266
267 }
268 //11.手机的定义与描述
269 package test;
270
271 public class phone {
272 private String user;//使用者
273 private int G;//几G手机
274 private int rom;//存储空间多大
275 private int ram;//运行内存多大
276 public phone(String user, int g, int rom, int ram) {
277 this.user = user;
278 G = g;
279 this.rom = rom;
280 this.ram = ram;
281 }
282 public void output(){
283 System.out.println("手机使用者为:"+user+"\n"+G+"G手机"+"\n"+"存储空间为:"+rom+"\n"+"运行内存为:"+ram);
284 }
285 }
286 package test;
287
288 public class phonetest {
289
290 public static void main(String[] args) {
291 phone phone=new phone("小明", 5, 512, 16);
292 phone.output();
293 }
294
295 }
296 //12.教材如何定义与描述的
297 package test;
298
299 public class textbook {
300 private String name;//书名
301 private String author;//作者
302 private String kind;//什么类别的
303 public textbook(String name, String author, String kind) {
304 this.name = name;
305 this.author = author;
306 this.kind = kind;
307 }
308 public void output(){
309 System.out.println("书名为"+name+"\n"+"作者为:"+author+"\n"+"书的类别为:"+kind);
310 }
311 }
312 package test;
313
314 public class textbooktest {
315
316 public static void main(String[] args) {
317 textbook textbook=new textbook("java", "小明", "教育用书");
318 textbook.output();
319 }
320
321 }
322 //13.班级的定义与描述
323 package test;
324
325 public class class_ {
326 private String name;//班级名字
327 private int person;//班级人数
328 private String banzhang;//班长
329 public class_(String name, int person, String banzhang) {
330 this.name = name;
331 this.person = person;
332 this.banzhang = banzhang;
333 }
334 public void output(){
335 System.out.println("班级名字为"+name+"\n"+"班长为:"+banzhang+"\n"+"班级人数为:"+person);
336 }
337 }
338 package test;
339
340 public class class_test {
341
342 public static void main(String[] args) {
343 class_ a=new class_("计算机六班", 25, "小明");
344 a.output();
345 }
346
347 }
348 //14.选课的定义与描述
349 package test;
350
351 public class xk {
352 private String time;//选课时间
353 private String bs;//系统内置的必修课
354 private String xx;//选修课
355 public xk(String time, String bs, String xx) {
356 this.time = time;
357 this.bs = bs;
358 this.xx = xx;
359 }
360 public void output(){
361 System.out.println("选课时间为"+time+"\n"+"必修课为:"+bs+"\n"+"选修课为:"+xx);
362 }
363 }
364 package test;
365
366 public class xktest {
367
368 public static void main(String[] args) {
369 xk a=new xk("2021年一月13日", "javaweb", "美学");
370 a.output();
371
372 }
373
374 }
375 //15.一个大学如何定义与描述
376 package test;
377
378 public class university {
379 private String local;//位于哪里
380 private String name;//大学名字
381 private int ss;//在校学生
382 public university(String local, String name, int ss) {
383 this.local = local;
384 this.name = name;
385 this.ss = ss;
386 }
387 public void output(){
388 System.out.println("大学校名为"+name+"\n"+"位于:"+local+"\n"+"在校学生人数为:"+ss);
389 }
390 }
391 package test;
392
393 public class universitytest {
394
395 public static void main(String[] args) {
396 university a=new university("泰安市", "山东农业大学", 40000);
397 a.output();
398
399 }
400
401 }
402 //1.直线方程一般式
403 package test;
404
405 import java.util.Scanner;
406
407 public class line_1 {
408 private double a;
409 private double b;
410 private double c;
411 private double x;
412 private double y;
413 public line_1(){
414 }
415 public line_1(double a, double b, double c) {
416 this.a = a;
417 this.b = b;
418 this.c = c;
419 }
420 public double getX() {
421 return x;
422 }
423 public void setX(double x) {
424 this.x = x;
425 }
426 public double getY() {
427 return y;
428 }
429 public void setY(double y) {
430 this.y = y;
431 }
432 public double d() {
433 double fm=Math.sqrt(a*a+b*b);
434 double fz=Math.abs(a*x+b*y+c);
435 return fz/fm;
436 }
437 public void jd() {
438 double xz=-c/a;//直线与x轴上的交点
439 double yz=-c/b;//直线与y轴上的交点
440 System.out.println("直线与x轴上的交点为:"+xz);
441 System.out.println("直线与y轴上的交点为:"+yz);
442 }
443 public void input() {
444 System.out.println("请输入一般式直线方程的A,B,C三个参数:");
445 Scanner in=new Scanner(System.in);
446 a=in.nextDouble();
447 b=in.nextDouble();
448 c=in.nextDouble();
449 System.out.println("宁所输入的直线方程为:"+a+"*X+"+b+"*Y+"+c+"*C"+"=0");
450 System.out.println("请输入坐标x,y以求其到直线的距离");
451 x=in.nextDouble();
452 y=in.nextDouble();
453 }
454 public void output() {
455 System.out.println("点"+"("+x+","+y+")"+"到"+a+"*X+"+b+"*Y+"+c+"*C"+"=0"+"的距离为:"+d());
456 }
457
458 }
459 package test;
460
461 public class line_1test {
462
463 public static void main(String[] args) {
464 line_1 a=new line_1();
465 a.input();
466 a.output();
467 a.jd();
468 }
469
470 }
471 //2.直线方程点斜式
472 package test;
473
474 public class line_2 {
475 private double x0, x1;
476 private double y0, y1;
477 private double k;
478
479 public line_2(double x0, double y0, double x1, double y1, double k) {
480 this.x0 = x0;
481 this.y0 = y0;
482 this.x1 = x1;
483 this.y1 = y1;
484 this.k = k;
485 }
486
487 public double d() {
488 double fm = Math.sqrt(1 + k * k);
489 double fz = Math.abs(k * x1 - y1 + y0 - k * x0);
490 return fz / fm;
491 }
492 public void output() {
493 System.out.println("点"+"("+x1+","+y1+")"+"到直线y-2=2*(x-1)"+"的距离为:"+d());
494 }
495 }
496 package test;
497
498 public class line_2test {
499
500 public static void main(String[] args) {
501 line_2 a=new line_2(1, 2, 3, 4, 2);
502 a.output();
503 }
504
505 }
506 //3.直线方程截距式
507 package test;
508
509 public class line_3 {
510 private double a,b,x,y;
511
512 public line_3(double a, double b, double x, double y) {
513 this.a = a;
514 this.b = b;
515 this.x = x;
516 this.y = y;
517 }
518 private double d() {
519 double fm = Math.sqrt(a*a+b*b);
520 double fz = Math.abs(b*x+a*y-a*b);
521 return fz / fm;
522 }
523 public void output() {
524 System.out.println("点"+"("+x+","+y+")"+"到直线x/1+y/2=1"+"的距离为:"+d());
525 }
526 }
527 package test;
528
529 public class line_3test {
530
531 public static void main(String[] args) {
532 line_3 a=new line_3(1, 2, 3, 4);
533 a.output();
534 }
535
536 }
537 //4.直线方程斜截式
538 package test;
539
540 public class line_4 {
541 private double k, b, x, y;
542
543 public line_4(double k, double b, double x, double y) {
544 this.k = k;
545 this.b = b;
546 this.x = x;
547 this.y = y;
548 }
549
550 private double d() {
551 double fm = Math.sqrt(1 + k * k);
552 double fz = Math.abs(k * x - y + b);
553 return fz / fm;
554 }
555
556 public void output() {
557 System.out.println("点" + "(" + x + "," + y + ")" + "到直线y=1*x+b" + "的距离为:" + d());
558 }
559 }
560 package test;
561
562 public class line_4test {
563
564 public static void main(String[] args) {
565 line_4 a=new line_4(1, 2, 3, 4);
566 a.output();
567 }
568
569 }
570 //5.直线方程两点式
571 package test;
572
573 public class line_5 {
574 private double x,y,x1,y1,x2,y2;
575 public line_5(double x, double y, double x1, double y1, double x2, double y2) {
576 this.x = x;
577 this.y = y;
578 this.x1 = x1;
579 this.y1 = y1;
580 this.x2 = x2;
581 this.y2 = y2;
582 }
583 private double d() {
584 double k=(y2-y1)/(x2-x1);
585 double fm = Math.sqrt(1 + k * k);
586 double fz = Math.abs(k * x - y + y1 - k * x1);
587 return fz / fm;
588 }
589 public void output() {
590 System.out.println("点" + "(" + x + "," + y + ")" + "到直线(y-4)/(6-4)=(x-3)/(5-3)" + "的距离为:" + d());
591 }
592 }
593 package test;
594
595 public class line_5test {
596
597 public static void main(String[] args) {
598 line_5 a=new line_5(6, 5, 3, 4, 5, 6);
599 a.output();
600 }
601
602 }
603 //定义素数
604 package test;
605
606 public class sushu {
607 private int i,j,l,r;
608 public sushu() {
609
610 }
611
612 public int getL() {
613 return l;
614 }
615
616 public void setL(int l) {
617 this.l = l;
618 }
619
620 public int getR() {
621 return r;
622 }
623
624 public void setR(int r) {
625 this.r = r;
626 }
627
628 public sushu(int l, int r) {
629 this.l = l;
630 this.r = r;
631 }
632
633 public void fun() {
634 int count=0;
635 int m=l;
636 if(l==1) {
637 l=2;
638 }
639 System.out.println(m+"到"+r+"之间的素数为:");
640 for(i=l;i<=r;++i) {
641 int t=0;
642 for(j=2;j<=Math.sqrt(i);++j) {
643 if(i%j==0) {
644 ++t;
645 }
646 }
647 if(t==0) {
648
649 System.out.print(i+" ");
650 count++;
651 if(count%5==0) {
652 System.out.println();
653 }
654 }
655 }
656 }
657
658
659 }
660 package test;
661
662 import java.util.Scanner;
663
664 public class sushutest {
665
666 public static void main(String[] args) {
667 System.out.println("请输入宁想取那段区间的素数:");
668 Scanner in=new Scanner(System.in);
669 int l=in.nextInt();
670 int r=in.nextInt();
671 sushu a=new sushu(l, r);
672 a.fun();
673 }
674
675 }
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