{"id":525,"date":"2009-10-11T01:47:05","date_gmt":"2009-10-10T17:47:05","guid":{"rendered":"http:\/\/test999.eblhost.com\/blog\/?p=525"},"modified":"2009-11-17T11:00:26","modified_gmt":"2009-11-17T03:00:26","slug":"processing%ef%bc%9a%e5%af%b9%e8%b1%a1","status":"publish","type":"post","link":"https:\/\/learn.travelchinawith.me\/?p=525","title":{"rendered":"Processing\uff1a\u5bf9\u8c61"},"content":{"rendered":"

1. \u7c7b\uff08Class\uff09\u7684\u540d\u5b57\u5e38\u5e38\u4ee5\u5927\u5199\u5f00\u5934\uff0c\u7528\u4ee5\u4e0e\u53d8\u91cf\u533a\u5206<\/p>\n

2. \u521d\u59cb\u5316\u5bf9\u8c61\uff08Object\uff09\u7684\u65b9\u5f0f\uff1amyCar = new Car();<\/em><\/span> \u3002\u5982\u679c\u4f60\u5fd8\u8bb0\u521d\u59cb\u5316\u4e00\u4e2a\u5bf9\u8c61\uff0c\u5219\u4ed6\u4f1a\u88abpr\u9ed8\u8ba4\u4e3anull\u3002null\u610f\u5473\u7740\u4ec0\u4e48\u4e5f\u6ca1\u6709\uff0c\u65e2\u4e0d\u662f0\uff0c\u4e5f\u4e0d\u662f\u8d1f\u6570\u3002\u5982\u679c\u4f60\u9047\u5230\u7c7b\u4f3c\u201cNullPointerException\u201d\u7684\u9519\u8bef\uff0c\u7edd\u5927\u591a\u6570\u60c5\u51b5\u4e0b\uff0c\u4fbf\u662f\u7531\u4e8e\u5fd8\u8bb0\u521d\u59cb\u5316\u4e00\u4e2a\u5bf9\u8c61\u9020\u6210\u7684\u3002<\/p>\n

3. \u4f7f\u7528\u4e00\u4e2a\u5bf9\u8c61\u7684\u65b9\u5f0f\uff1avariableName.objectMethod(Method Arguments); \u4f8b\u5982\uff1amyCar.draw(); <\/span><\/em><\/p>\n

4. \u770b\u4e00\u4e2a\u5bf9\u8c61\u5e94\u7528\u7684\u4f8b\u5b50\uff1a
\n Car myCar; \/\/ \u7533\u660e\u5bf9\u8c61car\u4e3a\u4e00\u4e2a\u5168\u5c40\u53d8\u91cf<\/span><\/em><\/p>\n

void setup() {
\nsize(200,200);
\n\/\/ \u521d\u59cb\u5316Car\u5bf9\u8c61
\nmyCar = new Car(); \/\/ \u547c\u53eb\u6784\u9020\u5668\uff08constructor\uff09\u5728setup() \u5185\u521d\u59cb\u5316car\u5bf9\u8c61.
\n}<\/span><\/em><\/p>\n

void draw() {
\nbackground(255);
\n\/\/ \u64cd\u4f5c\u5bf9\u8c61Car.
\nmyCar.move(); \/\/ \u7528.\u8bed\u6cd5\uff08dots syntax\uff09\u547c\u53eb\u5bf9\u8c61\u65b9\u5f0f\uff08method\uff09\u5728draw( ) \u5185\u8fd0\u884c\u5bf9\u8c61car.
\nmyCar.display();
\n}<\/span><\/em><\/p>\n

class Car { \/\/ \u5b9a\u4ee5\u4e00\u4e2a\u7c7b\uff08class\uff09.
\ncolor c; \/\/ \u53d8\u91cf\u4eec.
\nfloat xpos;
\nfloat ypos;
\nfloat xspeed;<\/span><\/em><\/p>\n

Car() { \/\/ \u4e00\u4e2a\u6784\u9020\u5668\uff08Constructor\uff09.
\nc = color(175);
\nxpos = width\/2;
\nypos = height\/2;
\nxspeed = 1;
\n}<\/span><\/em><\/p>\n

void display() { \/\/ \u51fd\u6570.
\n\/\/ \u8f66\u5c31\u662f\u4e00\u4e2a\u77e9\u5f62
\nrectMode(CENTER);
\nstroke(0);
\nfill(c);
\nrect(xpos,ypos,20,10);
\n}<\/span><\/em><\/p>\n

void move() { \/\/ \u51fd\u6570.
\nxpos = xpos + xspeed;
\nif (xpos > width) {
\nxpos = 0;
\n}
\n}
\n}<\/span><\/em><\/p>\n

5. \u4e0e\u81ea\u5b9a\u4e49\u51fd\u6570\u4e00\u6837\uff0c\u4e00\u4e2a\u7c7b\u53ef\u4ee5\u6446\u653e\u5728\u4f60\u7a0b\u5e8f\u4efb\u610f\u7684\u4f4d\u7f6e\u3002<\/p>\n

\"New<\/a>
New Tab<\/figcaption><\/figure>\n

6. \u70b9\u51fbpr\u7a97\u53e3\u6700\u53f3\u8fb9\u7684\u7bad\u5934\u6309\u94ae\uff0c\u4f1a\u5f39\u51fa\u83dc\u5355\uff0c\u9009\u62e9\u201cNew Tab\u201d\u5219\u53ef\u4ee5\u5728\u5f53\u524d\u7a97\u53e3\u6253\u5f00\u65b0\u6807\u7b7e\uff0c\u5982\u4e0a\u4f8b\uff0c\u4f60\u53ef\u4ee5\u5c06\u7c7bCar\u5199\u5165\u65b0\u5f00\u7684\u6807\u7b7e\u5185\uff0c\u8fd9\u6837\u66f4\u4fbf\u4e8e\u9605\u8bfb\u3002\u6ce8\u610f\uff0c\u5f53\u4f60\u4fdd\u5b58\u7684\u65f6\u5019\uff0c\u5c06\u4f1a\u5728\u4f60\u7684sketch\u6587\u4ef6\u5939\u5185\u540c\u65f6\u4fdd\u5b58\u6210\u4e24\u4e2apde\u6587\u4ef6\u3002\u672c\u4eba\u7ecf\u5b9e\u8df5\u8bc1\u660e\uff0c\u5fc5\u987b\u628a\u4ececlass\u5f00\u59cb\u4e00\u76f4\u5230\u7ed3\u5c3e\u7684\u4ee3\u7801\u5168\u90e8\u62f7\u5165\u65b0\u6807\u7b7e\u4e2d\uff0c\u7a0b\u5e8f\u624d\u4e0d\u4f1a\u51fa\u9519\uff0c\u65b0\u6807\u7b7e\u7684\u540d\u5b57\u53ef\u4ee5\u968f\u4fbf\u53d6\uff0c\u4f46\u662f\u6700\u597d\u4e0e\u4f60\u7684\u7c7b\u4e00\u81f4\u3002<\/p>\n

7. \u5982\u679c\u9700\u8981\u4e24\u4e2acar\u5bf9\u8c61\u5462\uff1f\u8bf7\u770b\u4e0b\u8fb9\u8fd9\u6bb5\u4ee3\u7801\uff1a
\n Car myCar1;
\nCar myCar2; \/\/ \u4e24\u4e2a\u5bf9\u8c61!<\/span><\/em><\/p>\n

void setup() {
\nsize(200,200);
\nmyCar1 = new Car(color(255,0,0),0,100,2); \/\/ \u5f53\u5bf9\u8c61\u88ab\u6784\u9020\u7684\u65f6\u5019\uff0c\u53c2\u6570\u8fdb\u5165\u5706\u62ec\u53f7\u5185
\nmyCar2 = new Car(color(0,0,255),0,10,1);
\n}<\/span><\/em><\/p>\n

void draw() {
\nbackground(255);
\nmyCar1.move();
\nmyCar1.display();
\nmyCar2.move();
\nmyCar2.display();
\n}<\/span><\/em><\/p>\n

class Car { \/\/ \u5c3d\u7ba1\u6709\u591a\u4e2a\u5bf9\u8c61\uff0c\u6211\u4eec\u4ecd\u4ec5\u9700\u8981\u4e00\u4e2a\u7c7b\u3002\u5c31\u50cf\u65e0\u8bba\u6211\u4eec\u5236\u9020\u591a\u5c11\u4e2a\u66f2\u5947\uff0c\u6211\u4eec\u90fd\u4ec5\u9700\u8981\u4e00\u53f0\u66f2\u5947\u673a\u3002
\ncolor c;
\nfloat xpos;
\nfloat ypos;
\nfloat xspeed;<\/span><\/em><\/p>\n

Car(color tempC, float tempXpos, float tempYpos, float tempXspeed) { \/\/ \u6784\u9020\u5668\u88ab\u5f15\u6570\u5b9a\u4e49.
\nc = tempC;
\nxpos = tempXpos;
\nypos = tempYpos;
\nxspeed = tempXspeed;
\n}<\/span><\/em><\/p>\n

void display() {
\nstroke(0);
\nfill(c);
\nrectMode(CENTER);
\nrect(xpos,ypos,20,10);
\n}<\/span><\/em><\/p>\n

void move() {
\nxpos = xpos + xspeed;
\nif (xpos > width) {
\nxpos = 0;
\n}
\n}
\n}<\/span><\/em><\/p>\n

8. \u8fd8\u8bb0\u5f97\u4e4b\u524d\u90a3\u4e2a\u5f39\u8df3\u5c0f\u7403\u7684\u4f8b\u5b50\u5417\uff1f\u770b\u770b\u5b83\u7528\u5bf9\u8c61\u548c\u7c7b\u91cd\u5199\u7684\u4f8b\u5b50\uff08\u6e90\u6587\u4ef6<\/a>\uff09\u3002\uff08\u662f\u7684\uff0c\u5f88\u7ed5\uff0c\u800c\u4e14\u6682\u65f6\u8fd8\u65e0\u6cd5\u770b\u51fa\u8fd9\u6837\u505a\u7684\u597d\u5904\u3002\u3002\uff09<\/p>\n

9. \u5bf9\u8c61\u662f\u50cf\u6574\u6570\u548c\u5c0f\u6570\u4e00\u6837\u7684\u6570\u636e\u7c7b\u578b\u3002\u56e0\u4e3a\u7c7b\u662f\u7531\u6570\u636e\u6784\u6210\u7684\uff0c\u56e0\u6b64\u4e00\u4e2a\u5bf9\u8c61\u53ef\u4ee5\u5305\u542b\u53e6\u4e00\u4e2a\u5bf9\u8c61\u3002\u4f8b\u5982\uff1a
\n class PlaceSetting {
\nFork fork;
\nSpoon spoon;
\nPlaceSetting() {
\nfork = new Fork();
\nspoon = new Spoon();
\n}
\n}<\/em><\/span><\/p>\n

1<\/em>0. \u4e00\u4e2a\u51fd\u6570\u53ef\u4ee5\u4ee5\u4e00\u4e2a\u5bf9\u8c61\u4f5c\u4e3a\u5176\u5f15\u6570\u3002<\/p>\n

11. \u5728\u4e0a\u4e00\u8bfe\u4e2d\uff0c\u6211\u4eec\u77e5\u9053\uff0c\u51fd\u6570\u4f20\u9012\u7684\u662f\u4e00\u4e2a\u526f\u672c\u3002\u800c\u5bf9\u8c61\u5219\u4e0d\u540c\uff0c\u5f53\u5176\u4f20\u9012\u8fdb\u5165\u4e00\u4e2a\u51fd\u6570\u540e\uff0c\u4efb\u4f55\u5bf9\u88ab\u4f20\u9012\u5bf9\u8c61\u8fdb\u884c\u7684\u6539\u52a8\u90fd\u5c06\u5f71\u54cd\u5230\u6574\u4e2asketch\u5185\u5176\u51fa\u73b0\u7684\u5730\u65b9\u3002\u8fd9\u79cd\u73b0\u8c61\u53eb\u505a \u53c2\u7167\u4f20\u9012
\n\uff08pass by reference\uff09 \u3002<\/p>\n

12. \u4ec0\u4e48\u65f6\u5019\u5e94\u8be5\u4f7f\u7528\u201c\u57fa\u4e8e\u5bf9\u8c61\u7684\u7a0b\u5e8f\u8bbe\u8ba1\u201d\uff08object-oriented programming\uff09\uff1f\u5bf9\u4e8eDaniel\u5148\u751f\u6765\u8bf4\uff0c\u7b54\u6848\u662f\u201c\u603b\u662f\u201d\u3002\u5bf9\u8c61\u5141\u8bb8\u4f60\u5c06\u4e00\u4e2a\u8f6f\u4ef6\u7a0b\u5e8f\u5185\u7684\u6982\u5ff5\u7ec4\u7ec7\u6210\u4e3a\u6a21\u5757\uff0c\u4e00\u4e2a\u53ef\u91cd\u590d\u5229\u7528\u7684\u5305\u88f9\u3002\u5c3d\u7ba1\u5982\u6b64\uff0c\u5e76\u4e0d\u662f\u5728\u521b\u5efa\u6bcf\u4e00\u4e2a\u9879\u76ee\u7684\u65f6\u5019\u4f7f\u7528\u57fa\u4e8e\u5bf9\u8c61\u7684\u65b9\u5f0f\u90fd\u5f88\u65b9\u4fbf\u548c\u5fc5\u8981\uff0c\u5c24\u5176\u5f53\u4f60\u5904\u4e8e\u5b66\u4e60\u9636\u6bb5\u7684\u65f6\u5019\u3002\u5bf9\u4e8e\u4f60\u5e0c\u671b\u901a\u8fc7pr\u6765\u521b\u5efa\u7684\u9879\u76ee\uff0cDaniel\u8001\u5e08\u7684\u5efa\u8bae\u662f\uff1a\u6b65\u8fdb\u5f0f\u3002\u9996\u5148\u4ece\u5f80setup()\u548cdraw()\u91cc\u5199\u4ee3\u7801\u5f00\u59cb\uff0c\u987a\u5e8f\u6309\u903b\u8f91\u5199\u51fa\u4f60\u60f3\u8981\u7684\u548c\u4f60\u60f3\u770b\u5230\u7684\u3002\u968f\u7740\u4f60\u7684\u9879\u76ee\u5f00\u59cb\u6210\u957f\uff0c\u62bd\u65f6\u95f4\u91cd\u65b0\u7ec4\u7ec7\u4f60\u7684\u4ee3\u7801\uff0c\u4e5f\u8bb8\u9996\u5148\u4ece\u51fd\u6570\u5f00\u59cb\uff0c\u7136\u540e\u8fdb\u5165\u5bf9\u8c61\u3002\u5f53\u7136\uff0c\u662f\u5728\u4e0d\u6539\u53d8\u6700\u7ec8\u4f60\u60f3\u8981\u7684\u7ed3\u679c\u7684\u524d\u63d0\u4e0b\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"

1. \u7c7b\uff08Class\uff09\u7684\u540d\u5b57\u5e38\u5e38\u4ee5\u5927\u5199\u5f00\u5934\uff0c\u7528\u4ee5\u4e0e\u53d8\u91cf\u533a\u5206 2. \u521d\u59cb\u5316\u5bf9\u8c61\uff08Object\uff09\u7684\u65b9\u5f0f\uff1amyCar = new Car(); \u3002\u5982\u679c\u4f60\u5fd8\u8bb0\u521d\u59cb\u5316\u4e00\u4e2a\u5bf9\u8c61\uff0c\u5219\u4ed6\u4f1a\u88abpr\u9ed8\u8ba4\u4e3anull\u3002null\u610f\u5473\u7740\u4ec0\u4e48\u4e5f\u6ca1\u6709\uff0c\u65e2\u4e0d\u662f0\uff0c\u4e5f\u4e0d\u662f\u8d1f\u6570\u3002\u5982\u679c\u4f60\u9047\u5230\u7c7b\u4f3c\u201cNullPointerException\u201d\u7684\u9519\u8bef\uff0c\u7edd\u5927\u591a\u6570\u60c5\u51b5\u4e0b\uff0c\u4fbf\u662f\u7531\u4e8e\u5fd8\u8bb0\u521d\u59cb\u5316\u4e00\u4e2a\u5bf9\u8c61\u9020\u6210\u7684\u3002 3. \u4f7f\u7528\u4e00\u4e2a\u5bf9\u8c61\u7684\u65b9\u5f0f\uff1avariableName.objectMethod(Method Arguments); \u4f8b\u5982\uff1amyCar.draw(); 4. \u770b\u4e00\u4e2a\u5bf9\u8c61\u5e94\u7528\u7684\u4f8b\u5b50\uff1a Car myCar; \/\/ \u7533\u660e\u5bf9\u8c61car\u4e3a\u4e00\u4e2a\u5168\u5c40\u53d8\u91cf void setup() { size(200,200); \/\/ \u521d\u59cb\u5316Car\u5bf9\u8c61 myCar = new Car(); \/\/ \u547c\u53eb\u6784\u9020\u5668\uff08constructor\uff09\u5728setup() \u5185\u521d\u59cb\u5316car\u5bf9\u8c61. } void draw() { background(255); \/\/ \u64cd\u4f5c\u5bf9\u8c61Car. myCar.move(); \/\/ \u7528.\u8bed\u6cd5\uff08dots syntax\uff09\u547c\u53eb\u5bf9\u8c61\u65b9\u5f0f\uff08method\uff09\u5728draw( ) \u5185\u8fd0\u884c\u5bf9\u8c61car. myCar.display(); } class Car { \/\/ \u5b9a\u4ee5\u4e00\u4e2a\u7c7b\uff08class\uff09. color c; \/\/ \u53d8\u91cf\u4eec. […]<\/p>\n","protected":false},"author":4,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[57],"tags":[58],"class_list":["post-525","post","type-post","status-publish","format-standard","hentry","category-processing","tag-processing"],"blocksy_meta":[],"_links":{"self":[{"href":"https:\/\/learn.travelchinawith.me\/index.php?rest_route=\/wp\/v2\/posts\/525","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/learn.travelchinawith.me\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/learn.travelchinawith.me\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/learn.travelchinawith.me\/index.php?rest_route=\/wp\/v2\/users\/4"}],"replies":[{"embeddable":true,"href":"https:\/\/learn.travelchinawith.me\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=525"}],"version-history":[{"count":3,"href":"https:\/\/learn.travelchinawith.me\/index.php?rest_route=\/wp\/v2\/posts\/525\/revisions"}],"predecessor-version":[{"id":763,"href":"https:\/\/learn.travelchinawith.me\/index.php?rest_route=\/wp\/v2\/posts\/525\/revisions\/763"}],"wp:attachment":[{"href":"https:\/\/learn.travelchinawith.me\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=525"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/learn.travelchinawith.me\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=525"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/learn.travelchinawith.me\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=525"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}