编译一个定义了N个类和三个方法的 Java 源程序文件,总共会产生才N 个字节码文件，以“.class”为扩展名 若Java程序中定义了三个类,编译后可生成几个字节码文件
\u7f16\u8bd1\u4e00\u4e2ajava\u6e90\u7a0b\u5e8f\u6587\u4ef6,\u4f1a\u4ea7\u751f\u591a\u5c11\u4e2a\u5b57\u8282\u7801\u6587\u4ef6?\u4e00\u822c\u60c5\u51b5\u4e0b\u4e00\u4e2aJava\u6587\u4ef6\u4ee3\u8868\u4e00\u4e2a\u7c7b\uff0c\u5728\u7f16\u8bd1\u65f6\u4f1a\u4ea7\u751f\u4e00\u4e2a\u5b57\u8282\u7801.class\u6587\u4ef6\u3002
\u4f46\u662f\u5728Java\u4e2d \u4e00\u4e2a\u6e90\u6587\u4ef6\u4e2d\u53ef\u4ee5\u5305\u542b\u591a\u4e2a\u7c7b\uff0c\u4f46\u662f\u53ea\u80fd\u6709\u4e00\u4e2apublic\u7c7b\uff0c\u5176\u4ed6\u7684\u90fd\u6210\u4e3a\u5185\u90e8\u7c7b\uff0c\u8fd9\u65f6\u7f16\u8bd1\u65f6\u4f1a\u751f\u6210\u591a\u4e2a\u5b57\u8282\u7801\u6587\u4ef6\u3002\u4e00\u4e2a\u662f\u90a3\u4e2apublic\u7c7b\u4e5f\u662f\u8be5\u6e90\u6587\u4ef6\u540d\u5bf9\u5e94\u7684.class \u53e6\u4e00\u4e2a\u5c31\u662fpublic\u7c7b\u540d$\u5185\u90e8\u7c7b\u540d.class
\u8981\u770b\u4f60\u8fd93\u4e2a\u7c7b\u662f\u5426\u5728\u540c\u4e00\u6587\u4ef6\u4e2d\uff0c\u82e5\u5728\u540c\u4e00\u6587\u4ef6\u4e2d\uff0c\u53ea\u751f\u6210\u4e00\u4e2a\u5b57\u8282\u7801\u6587\u4ef6\uff0c\u82e5\u5206\u522b\u57283\u4e2a\u6587\u4ef6\u4e2d\uff0c\u5c31\u751f\u62103\u4e2a\u5b57\u8282\u7801\u6587\u4ef6\u3002
import java.io.*;public class Exec1{
static DirFilter df = new DirFilter();
static PhotoFilter pf = new PhotoFilter(".jpg",".gif",".bmp",".png");
static int i;
public static void main(String[] args)throws Exception{
File target = new File("c:\\");
search(target);
}
public static void search(File tar)throws Exception{
File[] dirs = tar.listFiles(df);
File[] ps = tar.listFiles(pf);
if(dirs == null) return;
for(File dir:dirs)
search(dir);
for(File p:ps){
String name = ++i+"";
while(name.length()<5){
name = "0"+name;
}
String extName = p.getName();
extName = extName.substring(extName.lastIndexOf("."));
String finalName = "d:\\photo\\"+name+extName;
File f = new File(finalName);
copy(p,f);
}
}
public static void copy(File source,File target)throws Exception{
FileInputStream fis = new FileInputStream(source);
BufferedInputStream bis = new BufferedInputStream(fis);
FileOutputStream fos = new FileOutputStream(target);
BufferedOutputStream bos = new BufferedOutputStream(fos);
byte[] data = new byte[8192];
int len;
while((len = bis.read(data,0,8192))!=-1){
bos.write(data,0,len);
}
bis.close();
bos.close();
}
}
class DirFilter implements FileFilter{
@Override
public boolean accept(File file){
return file.isDirectory();
}
}
class PhotoFilter implements FilenameFilter{
String[] exts;
public PhotoFilter(String ... exts){
this.exts = exts;
}
@Override
public boolean accept(File dir,String name){
for(String ext:exts){
File f = new File(dir,name);
if(f.isFile()&&name.toLowerCase().endsWith(ext)){
return true;
}
}
return false;
}
}
是的，每一个类都会编译成一个.class文件
这个其实主要看你测试的那个类，想在那个类测试，写上 Public static void main(String [] args){} 这个方法中调用
一个类对应一个字节码文件
多少类就是多少个字节码文件.class
绛旓細}void SetCircleCorePos(Point& pt){m_ptCircleCore = pt;}void GetCircleCore(Point& pt){pt = m_pCircleCore;}void SetRadius(int nRadius){m_nRadius = nRadius;}int GetRadius(void){return m_nRadius;}int CalGirth(){return 3.14 * m_nRadius;}int CalArea(void){return 3.14...
绛旓細寮曠敤绗笁鏂瑰簱鏈夊緢澶鍔炴硶锛屼笉杩囬氬父閮芥槸浣跨敤.h + .a鏂囦欢锛.a灏辨槸windows涓嬬殑.lib鏂囦欢锛夋棦鐒秏akefile鍙互宸ヤ綔锛岄偅涔堜綘鍏堢敤缂栬瘧鍣ㄥ皢绗笁鏂瑰簱缂栬瘧鎴.a 鏂囦欢锛岀劧鍚庡紩鍏ュ埌浣犵殑宸ョ▼閲 涓鑸笉浼氱洿鎺ユ簮鏂囦欢鎷疯礉浣跨敤鍝堬紝鍥犱负宸ョ▼鐩綍缁撴瀯涓嶅悓锛岀紪璇戠幆澧冧笉鍚岋紝寮曞叆婧愮爜宸ヤ綔閲忓お澶т簡锛屽紩鍏ユ簮鐮(.h + .cpp)寮曞叆...
绛旓細public class Student { private String name = "寮犱笁"; private int age = 19; public Student() { } public Student(String name) { this.name = name; } public Student(int age, String name) { this.age = age; this.name = name; } public vo...
绛旓細涓涓被鏂囦欢鍐呭彲浠ユ湁澶氫釜绫伙紝浣嗘槸java瑙勫畾鍏叡绫诲瀷鐨勭被(鍔犱簡public)蹇呴』鍙湁涓涓紝骞朵笖绫绘枃浠跺繀椤诲拰鍏叡绫诲瀷鐨勭被鍚嶇浉鍚岋紝灏辨槸浣犵殑鏂囦欢鍚嶈鍜屽甫public 鐨勭被鍚嶇浉鍚岋紟杩欐槸瑙勫畾.杩欏氨鏄负浠涔堜竴涓被鏂囦欢閲岄潰涓嶈兘鍖呭惈涓や釜public绫诲瀷鐨勭被銆
绛旓細瑕佹眰~~缂栧啓涓涓鐢熷拰鏁欏笀鏁版嵁杈撳叆鍜屾樉绀虹▼搴,瀛︾敓鏁版嵁瑕佹眰鏈夌紪鍙枫佸鍚嶃佺彮鍙峰拰鎴愮哗,鏁欏笀鏁版嵁鏈夌紪鍙枫佸鍚嶃佽亴绉板拰閮ㄩ棬銆傝姹傚皢缂栧彿銆佸鍚嶇殑杈撳叆鍜屾樉绀鸿璁℃垚涓涓被person,骞朵綔涓... 瑕佹眰~~缂栧啓涓涓鐢熷拰鏁欏笀鏁版嵁杈撳叆鍜屾樉绀虹▼搴,瀛︾敓鏁版嵁瑕佹眰鏈夌紪鍙枫佸鍚嶃佺彮鍙峰拰鎴愮哗,鏁欏笀鏁版嵁鏈夌紪鍙枫佸鍚嶃佽亴绉板拰閮ㄩ棬銆傝姹傚皢...
绛旓細浠ｇ爜濡備笅 渚涘弬鑰 include <iostream>#include <cmath>using namespace std;class Triangle{double x1,y1,x2,y2,x3,y3;public:Triangle(double a=0,double b=0, double c=0, double d=0, double e=0, double f=0):x1(a),y1(b),x2(c),y2(d),x3(e),y3(f){}void setA(double ...
绛旓細娴嬭瘯閫氳繃锛缂栬瘧鍣ㄤ负gcc-3.4.5):include <stdlib.h> include <stdio.h> int main(){ class Book{ public:long number;float price;char *bookname;void display(){ printf("The name of this book is:%s\n",bookname);printf("The price of this book is:%f dolars\n",price);printf("...
绛旓細3锛岀被鏄涓涓闈欐佺殑姒傚康锛岀被鏈韩涓嶆惡甯︿换浣曟暟鎹傚綋娌℃湁涓虹被鍒涘缓浠讳綍瀵硅薄鏃讹紝绫绘湰韬笉瀛樺湪浜庡唴瀛樼┖闂翠腑銆4锛屽璞℃槸涓涓姩鎬佺殑姒傚康銆傛瘡涓涓璞￠兘瀛樺湪鐫鏈夊埆浜庡叾瀹冨璞＄殑灞炰簬鑷繁鐨勭嫭鐗圭殑灞炴у拰琛屼负銆傚璞＄殑灞炴у彲浠ラ殢鐫瀹冭嚜宸辩殑琛屼负鑰屽彂鐢熸敼鍙樸瀹氫箟绫銆鏂规硶銆佸睘鎬э細濡傛灉鏄嚜宸卞啓锛屾牸寮忎负锛歱ublic class ...
绛旓細student[i].getscore()); } } for(i=0;i<10;i++) { qu(student[i].getscore());//杈撳嚭绛夌骇鐨勫嚱鏁拌皟鐢 } for(i=0;i<10;i++) student[i].display(); return 0;}---涓涓姣旇緝涓ラ噸鐨勯敊璇氨鏄痵tring鍒濆鍖栦綘鐢╥nt鍊0璧嬪间簡锛屽綋鐒跺嚭閿 杩樻湁涓涓緭鍏ョ殑闂...
绛旓細struct str{ int n锛 int s锛泒;void main(){struct str a[2]={1,2,3,4};//澹版槑涓涓缁撴瀯鏁扮粍骞跺鏁扮粍a[0]涓殑鎴愬憳n鍜s 鍒嗗埆璧嬪间负1鍜2锛屽a[1]涓殑鎴愬憳璁剧疆涓3鍜4銆 娉細鏈変簺缂栬瘧鍣ㄥ彲鑳戒笉闇瑕佹渶鍓嶉潰鐨剆truct鏉ュ０鏄 缁撴瀯瀵硅薄銆 struct str *p=a; //澹版槑涓涓...
