\u6587\u4ef6\u8f93\u5165\u8f93\u51fa\u6d41<\/p>\n
\u6587\u4ef6\u8f93\u5165\u8f93\u51fa\u6d41 FileInputStream \u548c FileOutputStream \u8d1f\u8d23\u5b8c\u6210\u5bf9\u672c\u5730\u78c1\u76d8\u6587\u4ef6\u7684\u987a\u5e8f\u8f93\u5165\u8f93\u51fa\u64cd\u4f5c\u3002
\n<\/p>\n
\u3010\u4f8b 10-5\u3011\u901a\u8fc7\u7a0b\u5e8f\u521b\u5efa\u4e00\u4e2a\u6587\u4ef6\uff0c\u4ece\u952e\u76d8\u8f93\u5165\u5b57\u7b26\uff0c\u5f53\u9047\u5230\u5b57\u7b26\u201c#\u201d\u65f6\u7ed3\u675f\uff0c\u5728\u5c4f\u5e55\u4e0a\u663e\u793a\u8be5\u6587\u4ef6\u7684\u6240\u6709\u5185\u5bb9\u3002
\n[java]import java.io.*;
\nclass ep10_5{
\n\u00a0\u00a0\u00a0 public static void main(String args[]){
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 char ch;
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 int data;
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 try{
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 FileInputStream a=new FileInputStream(FileDescriptor.in); \/\/\u521b\u5efa\u6587\u4ef6\u8f93\u5165\u6d41\u5bf9\u8c61
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 FileOutputStream b=new FileOutputStream("ep10_5"); \/\/\u521b\u5efa\u6587\u4ef6\u8f93\u51fa\u6d41\u5bf9\u8c61
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 System.out.println("\u8bf7\u8f93\u5165\u5b57\u7b26\uff0c\u4ee5#\u53f7\u7ed3\u675f\uff1a");
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 while((ch=(char)a.read())!=’#’){
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 b.write(ch);
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 }
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 a.close();
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 b.close();
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 System.out.println();
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 FileInputStream c=new FileInputStream("ep10_5");
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 FileOutputStream d=new FileOutputStream(FileDescriptor.out);
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 while(c.available()>0){
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 data=c.read();
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 d.write(data);
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 }
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 c.close();d.close();
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 }
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 catch(FileNotFoundException e){
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 System.out.println("\u627e\u4e0d\u5230\u8be5\u6587\u4ef6\uff01");
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 }
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 catch(IOException e){}
\n\u00a0\u00a0\u00a0 }
\n}
\n[\/java]<\/p>\n
FileDescriptor \u662f java.io \u4e2d\u7684\u4e00\u4e2a\u7c7b\uff0c\u8be5\u7c7b\u4e0d\u80fd\u5b9e\u4f8b\u5316\uff0c\u5176\u4e2d\u5305\u542b\u4e09\u4e2a\u9759\u6001\u6210\u5458\uff1ain\u3001out \u548cerr\uff0c\u5206\u522b\u5bf9\u5e94\u4e8e\u6807\u51c6\u8f93\u5165\u6d41\u3001\u6807\u51c6\u8f93\u51fa\u6d41\u548c\u6807\u51c6\u9519\u8bef\u6d41\uff0c\u5229\u7528\u5b83\u4eec\u53ef\u4ee5\u5728\u6807\u51c6\u8f93\u5165\u8f93\u51fa\u6d41\u4e0a\u5efa\u7acb\u6587\u4ef6\u8f93\u5165\u8f93\u51fa\u6d41\uff0c\u5b9e\u73b0\u952e\u76d8\u8f93\u5165\u6216\u5c4f\u5e55\u8f93\u51fa\u64cd\u4f5c\u3002<\/p>\n
\u3010\u4f8b 10-6\u3011\u5b9e\u73b0\u5bf9\u4e8c\u8fdb\u5236\u56fe\u5f62\u6587\u4ef6\uff08.gif\uff09\u7684\u5907\u4efd\u3002
\n[java]import java.io.*;
\nclass ep10_6{
\n\u00a0\u00a0\u00a0 public static void main(String args[]) throws IOException{
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 FileInputStream a=new FileInputStream("ep10_6.gif");
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 FileOutputStream b=new FileOutputStream("ep10_6_a.gif");
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 System.out.println("\u6587\u4ef6\u7684\u5927\u5c0f\u4e3a\uff1a"+a.available());
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 byte c[]=new byte[a.available()];
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 a.read(c); \/\/\u5c06\u56fe\u5f62\u6587\u4ef6\u8bfb\u5165\u6570\u7ec4
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 b.write(c); \/\/\u5c06\u6570\u7ec4\u4e2d\u7684\u6570\u636e\u5199\u5165\u5230\u65b0\u6587\u4ef6\u4e2d
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 System.out.println("\u6587\u4ef6\u5df2\u7ecf\u88ab\u66f4\u540d\u590d\u5236\uff01");
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 a.close();
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 b.close();
\n\u00a0\u00a0\u00a0 }
\n}
\n[\/java]
\n\u8fc7\u6ee4\u6d41<\/p>\n
FilterInputStream \u548c FileOutputStream \u662f InputStream \u548c OutputStream \u7684\u76f4\u63a5\u5b50\u7c7b\uff0c\u5206\u522b\u5b9e\u73b0\u4e86\u5728\u6570\u636e\u7684\u8bfb\u3001\u5199\u64cd\u4f5c\u7684\u540c\u65f6\u80fd\u5bf9\u6240\u4f20\u8f93\u7684\u6570\u636e\u505a\u6307\u5b9a\u7c7b\u578b\u6216\u683c\u5f0f\u7684\u8f6c\u6362\uff0c\u5373\u53ef\u5b9e\u73b0\u5bf9\u4e8c\u8fdb\u5236\u5b57\u8282\u6570\u636e\u7684\u7406\u89e3\u548c\u7f16\u7801\u8f6c\u6362\u3002<\/p>\n
\u5e38\u7528\u7684\u4e24\u4e2a\u8fc7\u6ee4\u6d41\u662f\u6570\u636e\u8f93\u5165\u6d41 DataInputStream \u548c\u6570\u636e\u8f93\u51fa\u6d41 DataOutputStream\u3002\u5176\u6784\u9020\u65b9\u6cd5\u4e3a\uff1a
\n\u00a0\u00a0\u00a0 DataInputStream(InputStream in); \/\/\u521b\u5efa\u65b0\u8f93\u5165\u6d41\uff0c\u4ece\u6307\u5b9a\u7684\u8f93\u5165\u6d41 in \u8bfb\u6570\u636e
\n\u00a0\u00a0\u00a0 DataOutputStream(OutputStream out); \/\/\u521b\u5efa\u65b0\u8f93\u51fa\u6d41\uff0c\u5411\u6307\u5b9a\u7684\u8f93\u51fa\u6d41 out \u5199\u6570\u636e<\/p>\n
\u7531\u4e8e DataInputStream \u548c DataOutputStream \u5206\u522b\u5b9e\u73b0\u4e86 DataInput \u548c DataOutput \u4e24\u4e2a\u63a5\u53e3\uff08\u8fd9\u4e24\u4e2a\u63a5\u53e3\u89c4\u5b9a\u4e86\u57fa\u672c\u7c7b\u578b\u6570\u636e\u7684\u8f93\u5165\u8f93\u51fa\u65b9\u6cd5\uff09\u4e2d\u5b9a\u4e49\u7684\u72ec\u7acb\u4e8e\u5177\u4f53\u673a\u5668\u7684\u5e26\u683c\u5f0f\u7684\u8bfb\u5199\u64cd\u4f5c\uff0c\u4ece\u800c\u5b9e\u73b0\u4e86\u5bf9\u4e0d\u540c\u7c7b\u578b\u6570\u636e\u7684\u8bfb\u5199\u3002\u7531\u6784\u9020\u65b9\u6cd5\u53ef\u4ee5\u770b\u51fa\uff0c\u8f93\u5165\u8f93\u51fa\u6d41\u5206\u522b\u4f5c\u4e3a\u6570\u636e\u8f93\u5165\u8f93\u51fa\u6d41\u7684\u6784\u9020\u65b9\u6cd5\u53c2\u6570\uff0c\u5373\u4f5c\u4e3a\u8fc7\u6ee4\u6d41\u5fc5\u987b\u4e0e\u76f8\u5e94\u7684\u6570\u636e\u6d41\u76f8\u8fde\u3002<\/p>\n
DataInputStream \u548c DataOutputStream \u7c7b\u63d0\u4f9b\u4e86\u5f88\u591a\u4e2a\u9488\u5bf9\u4e0d\u540c\u7c7b\u578b\u6570\u636e\u7684\u8bfb\u5199\u65b9\u6cd5\uff0c\u5177\u4f53\u5185\u5bb9\u8bfb\u8005\u53ef\u53c2\u770b Java \u7684\u5e2e\u52a9\u6587\u6863\u3002<\/p>\n
\u3010\u4f8b 10-7\u3011\u5c06\u4e09\u4e2a int \u578b\u6570\u5b57 100\uff0c0\uff0c-100 \u5199\u5165\u6570\u636e\u6587\u4ef6 ep10_6.dat \u4e2d\u3002<\/p>\n
[java]import java.io.*;
\nclass ep10_7{
\n\u00a0\u00a0\u00a0 public static void main(String args[]){
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 String fileName="ep10_7.dat";
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 int value1=100,value2=0,value3=-100;
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 try{
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \/\/\u5c06 DataOutputStream \u4e0e FileOutputStream \u8fde\u63a5\u8f93\u51fa\u4e0d\u540c\u7c7b\u578b\u7684\u6570\u636e
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 DataOutputStream a=new DataOutputStream(new FileOutputStream(fileName));
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 a.writeInt(value1);
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 a.writeInt(value2);
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 a.writeInt(value3);
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 a.close();
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 }
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 catch(IOException i){
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 System.out.println("\u51fa\u73b0\u9519\u8bef!"+fileName);
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 }
\n\u00a0\u00a0\u00a0 }
\n}[\/java]
\n\u8fd0\u884c\u540e\u5728\u7a0b\u5e8f\u76ee\u5f55\u4e2d\u751f\u6210\u6570\u636e\u6587\u4ef6 ep10_7.dat\uff0c\u7528\u6587\u672c\u7f16\u8f91\u5668\u6253\u5f00\u540e\u53d1\u73b0\u5185\u5bb9\u4e3a\u4e8c\u8fdb\u5236\u7684\uff1a
\n00 00 00 64 00 00 00 00 FF FF FF 9C\u3002<\/p>\n
\u3010\u4f8b 10-8\u3011\u8bfb\u53d6\u6570\u636e\u6587\u4ef6 ep10_6.dat \u4e2d\u7684\u4e09\u4e2a int \u578b\u6570\u5b57\uff0c\u6c42\u548c\u5e76\u663e\u793a\u3002
\n[java]import java.io.*;
\nclass ep10_8{
\n\u00a0\u00a0\u00a0 public static void main(String args[]){
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 String fileName="D:\\\\myjava\/ep10_7.dat";
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 int sum=0;
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 try{
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 DataInputStream a=new DataInputStream(new BufferedInputStream(new FileInputStream(fileName)));
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 sum+=a.readInt();
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 sum+=a.readInt();
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 sum+=a.readInt();
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 System.out.println("\u4e09\u4e2a\u6570\u7684\u548c\u4e3a\uff1a"+sum);
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 a.close();
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 }
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 catch(IOException e){
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 System.out.println("\u51fa\u73b0\u9519\u8bef\uff01"+fileName);
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 }
\n\u00a0\u00a0\u00a0 }
\n}
\n\u8fd0\u884c\u7ed3\u679c\uff1a
\n\u4e09\u4e2a\u6570\u7684\u548c\u4e3a\uff1a0
\n[\/java]
\nreadInt \u65b9\u6cd5\u53ef\u4ee5\u4ece\u8f93\u5165\u8f93\u51fa\u6d41\u4e2d\u8bfb\u5165 4 \u4e2a\u5b57\u8282\u5e76\u5c06\u5176\u4f5c\u4e3a int \u578b\u6570\u636e\u76f4\u63a5\u53c2\u4e0e\u8fd0\u7b97\u3002\u7531\u4e8e\u5df2\u7ecf\u77e5\u9053\u6587\u4ef6\u4e2d\u6709 3 \u4e2a\u6570\u636e\uff0c\u6240\u4ee5\u53ef\u4ee5\u4f7f\u7528 3 \u4e2a\u8bfb\u5165\u8bed\u53e5\uff0c\u4f46\u82e5\u53ea\u77e5\u9053\u6587\u4ef6\u4e2d\u662f int \u578b\u6570\u636e\u800c\u4e0d\u77e5\u9053\u6570\u636e\u7684\u4e2a\u6570\u65f6\u8be5\u600e\u4e48\u529e\u5462\uff1f\u56e0\u4e3a DataInputStream \u7684\u8bfb\u5165\u64cd\u4f5c\u5982\u9047\u5230\u6587\u4ef6\u7ed3\u5c3e\u5c31\u4f1a\u629b\u51fa EOFException \u5f02\u5e38\uff0c\u6240\u4ee5\u53ef\u5c06\u8bfb\u64cd\u4f5c\u653e\u5165 try \u4e2d\u3002
\n[java]try{
\n\u00a0\u00a0\u00a0 while(true)
\n\u00a0\u00a0\u00a0 sum+=a.readInt();
\n}
\ncatch(EOFException e){
\n\u00a0\u00a0\u00a0 System.out.pritnln("\u4e09\u4e2a\u6570\u7684\u548c\u4e3a\uff1a"+sum);
\n\u00a0\u00a0\u00a0 a.close();
\n}[\/java]
\nEOFException \u662f IOException \u7684\u5b50\u7c7b\uff0c\u53ea\u6709\u6587\u4ef6\u7ed3\u675f\u5f02\u5e38\u65f6\u624d\u4f1a\u88ab\u6355\u6349\u5230\uff0c\u4f46\u5982\u679c\u6ca1\u6709\u8bfb\u5230\u6587\u4ef6\u7ed3\u5c3e\uff0c\u5728\u8bfb\u53d6\u8fc7\u7a0b\u4e2d\u51fa\u73b0\u5f02\u5e38\u5c31\u5c5e\u4e8e IOException\u3002<\/p>\n
\u3010\u4f8b 10-9\u3011\u4ece\u952e\u76d8\u8f93\u5165\u4e00\u4e2a\u6574\u6570\uff0c\u6c42\u8be5\u6570\u7684\u5404\u4f4d\u6570\u5b57\u4e4b\u548c\u3002
\n[java]import java.io.*;
\nclass ep10_9{
\n\u00a0\u00a0\u00a0 public static void main(String args[]) throws IOException{
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 DataInputStream a=new DataInputStream(System.in);
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 System.out.print("\u8bf7\u8f93\u5165\u4e00\u4e2a\u6574\u6570\uff1a");
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 int b=a.readInt();
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 int sum=0;
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 int c=b;
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 while(c>0){
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 int d=c%10; \/\/\u53d6\u6700\u4f4e\u4f4d
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 c=c\/10; \/\/\u53bb\u6389\u6700\u4f4e\u4f4d
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 sum=sum+d; \/\/\u7d2f\u52a0\u5404\u4f4d\u4e4b\u548c
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 }
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 System.out.println(b+"\u7684\u5404\u4f4d\u6570\u5b57\u4e4b\u548c="+sum);
\n\u00a0\u00a0\u00a0 }
\n}
\n\u8fd0\u884c\u7ed3\u679c\uff1a
\n\u8bf7\u8f93\u5165\u4e00\u4e2a\u6574\u6570\uff1a26
\n842403082 \u7684\u5404\u4f4d\u6570\u5b57\u4e4b\u548c=31[\/java]<\/p>\n
\u9700\u8981\u6ce8\u610f\u7684\u662f\uff0c\u8f93\u5165\u7684\u6570\u636e 26 \u4e3a\u53d8\u6210\u4e86 842403082\uff0c\u539f\u56e0\u5728\u4e8e\u8f93\u5165\u6570\u636e\u4e0d\u7b26\u5408\u57fa\u672c\u7c7b\u578b\u6570\u636e\u7684\u683c\u5f0f\uff0c\u4ece\u952e\u76d8\u63d0\u4f9b\u7684\u6570\u636e\u662f\u5b57\u7b26\u7684\u5b57\u8282\u7801\u8868\u793a\u65b9\u5f0f\uff0c\u82e5\u8f93\u5165 26\uff0c\u53ea\u4ee3\u8868 2 \u548c 6 \u4e24\u4e2a\u5b57\u7b26\u7684\u5b57\u8282\u6570\u636e\uff0c\u800c\u4e0d\u662f\u4ee3\u8868\u6574\u6570 26 \u7684\u5b57\u8282\u7801\u3002<\/p>\n
\u82e5\u8981\u4ece\u952e\u76d8\u5f97\u5230\u6574\u6570\u9700\u8981\u5148\u8bfb\u53d6\u5b57\u7b26\u4e32\uff0c\u518d\u5229\u7528\u5176\u4ed6\u65b9\u6cd5\u5c06\u5b57\u7b26\u4e32\u8f6c\u5316\u4e3a\u6574\u6570\u3002
\n\u6807\u51c6\u8f93\u5165\u8f93\u51fa<\/p>\n
System.in\u3001System.out\u3001System.err \u8fd9 3 \u4e2a\u6807\u51c6\u8f93\u5165\u8f93\u6d41\u5bf9\u8c61\u5b9a\u4e49\u5728 java.lang.System \u5305\u4e2d\uff0c\u8fd9 3 \u4e2a\u5bf9\u8c61\u5728 Java \u6e90\u7a0b\u5e8f\u7f16\u8bd1\u65f6\u4f1a\u88ab\u81ea\u52a8\u52a0\u8f7d\u3002
\n\u6807\u51c6\u8f93\u5165\uff1a\u6807\u51c6\u8f93\u5165 System.in \u662f BufferedInputStream \u7c7b\u7684\u5bf9\u8c61\uff0c\u5f53\u7a0b\u5e8f\u9700\u8981\u4ece\u952e\u76d8\u4e0a\u8bfb\u5165\u6570\u636e\u65f6\uff0c\u53ea\u9700\u8981\u8c03\u7528 System.in \u7684 read()\u65b9\u6cd5\u5373\u53ef\uff0c\u8be5\u65b9\u6cd5\u4ece\u952e\u76d8\u7f13\u51b2\u533a\u8bfb\u5165\u4e00\u4e2a\u5b57\u8282\u7684\u4e8c\u8fdb\u5236\u6570\u636e\uff0c\u8fd4\u56de\u4ee5\u6b64\u5b57\u8282\u4e3a\u4f4e\u4f4d\u5b57\u8282\uff0c\u9ad8\u4f4d\u5b57\u8282\u4e3a 0 \u7684\u6574\u578b\u6570\u636e\u3002
\n\u6807\u51c6\u8f93\u51fa\uff1a\u6807\u51c6\u8f93\u51fa System.out \u662f\u6253\u5370\u8f93\u51fa\u6d41 PrintStream \u7c7b\u7684\u5bf9\u8c61\u3002PrintStream \u7c7b\u662f\u8fc7\u6ee4\u8f93\u51fa\u6d41\u7c7b FilterOutputStream \u7684\u4e00\u4e2a\u5b50\u7c7b\uff0c\u5176\u4e2d\u5b9a\u4e49\u4e86\u5411\u5c4f\u5e55\u8f93\u51fa\u4e0d\u540c\u7c7b\u578b\u6570\u636e\u7684\u65b9\u6cd5print()\u548c println()\u3002
\n\u6807\u51c6\u9519\u8bef\u8f93\u51fa\uff1aSystem.err \u7528\u4e8e\u4e3a\u7528\u6237\u663e\u793a\u9519\u8bef\u4fe1\u606f\uff0c\u4e5f\u662f\u7531 PrintStream \u7c7b\u6d3e\u751f\u51fa\u6765\u7684\u9519\u8bef\u6d41\u3002Err \u6d41\u7684\u4f5c\u7528\u662f\u4f7f print()\u548c println()\u5c06\u4fe1\u606f\u8f93\u51fa\u5230 err \u6d41\u5e76\u663e\u793a\u5728\u5c4f\u5e55\u4e0a\uff0c\u4ee5\u65b9\u4fbf\u7528\u6237\u4f7f\u7528\u548c\u8c03\u8bd5\u7a0b\u5e8f\u3002<\/p>\n
\u3010\u4f8b 10-10\u3011\u8f93\u5165\u4e00\u4e32\u5b57\u7b26\u663e\u793a\u51fa\u6765\uff0c\u5e76\u663e\u793a System.in \u548c System.out \u6240\u5c5e\u7684\u7c7b\u3002
\n[java]import java.io.*;
\nclass ep10_10{
\n\u00a0\u00a0\u00a0 public static void main(String args[]){
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 try{
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 byte a[]=new byte[128]; \/\/\u8bbe\u7f6e\u8f93\u5165\u7f13\u51b2\u533a
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 System.out.print("\u8bf7\u8f93\u5165\u5b57\u7b26\u4e32\uff1a");
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 int count =System.in.read(a); \/\/\u8bfb\u53d6\u6807\u51c6\u8f93\u5165\u8f93\u51fa\u6d41
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 System.out.println("\u8f93\u5165\u7684\u662f\uff1a");
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 for(int i=0;i<count;i++)
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 System.out.print(a[i]+""); \/\/\u8f93\u51fa\u6570\u7ec4\u5143\u7d20\u7684 ASCII \u503c
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 System.out.println();
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 for(int i=0;i<count-2;i++) \/\/\u4e0d\u663e\u793a\u56de\u8f66\u548c\u6362\u884c\u7b26
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 System.out.print((char)a[i]+""); \/\/\u6309\u5b57\u7b26\u65b9\u5f0f\u8f93\u51fa\u5143\u7d20
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 System.out.println();
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 System.out.println("\u8f93\u5165\u7684\u5b57\u7b26\u4e2a\u6570\u4e3a\uff1a"+count);
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Class InClass=System.in.getClass();
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Class OutClass=System.out.getClass();
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 System.out.println("in \u6240\u5728\u7684\u7c7b\u4e3a\uff1a"+InClass.toString());
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 System.out.println("out \u6240\u5728\u7684\u7c7b\u4e3a\uff1a"+OutClass.toString());
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 }
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 catch(IOException e){}
\n\u00a0\u00a0\u00a0 }
\n}
\n[\/java]
\n\u9700\u8981\u6ce8\u610f\u7684\u662f\uff0c\u8f93\u5165\u4e86 3 \u4e2a\u5b57\u7b26\u6309\u56de\u8f66\u540e\uff0c\u8f93\u51fa\u7684\u7ed3\u679c\u663e\u793a\u4e3a 5 \u4e2a\u5b57\u7b26\u3002\u8fd9\u662f\u7531\u4e8e Java \u4e2d\u56de\u8f66\u88ab\u5f53\u4f5c\u4e24\u4e2a\u5b57\u7b26\uff0c\u4e00\u4e2a\u662f ASC\u2161\u4e3a 13 \u7684\u56de\u8f66\u7b26\uff0c\u4e00\u4e2a\u662f\u503c\u4e3a 10 \u7684\u6362\u884c\u7b26\u3002\u7a0b\u5e8f\u4e2d getClass()\u548c ToString()\u662f Object \u7c7b\u7684\u65b9\u6cd5\uff0c\u4f5c\u7528\u5206\u522b\u662f\u8fd4\u56de\u5f53\u524d\u5bf9\u8c61\u6240\u5bf9\u5e94\u7684\u7c7b\u548c\u8fd4\u56de\u5f53\u524d\u5bf9\u8c61\u7684\u5b57\u7b26\u4e32\u8868\u793a\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
\u6587\u4ef6\u8f93\u5165\u8f93\u51fa\u6d41 \u6587\u4ef6\u8f93\u5165\u8f93\u51fa\u6d41 FileInputStream \u548c FileOutputStream \u8d1f\u8d23\u5b8c\u6210 […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[22],"tags":[],"_links":{"self":[{"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=\/wp\/v2\/posts\/260"}],"collection":[{"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=260"}],"version-history":[{"count":2,"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=\/wp\/v2\/posts\/260\/revisions"}],"predecessor-version":[{"id":323,"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=\/wp\/v2\/posts\/260\/revisions\/323"}],"wp:attachment":[{"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=260"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=260"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=260"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}