扩展 InputStream 的 inputStream new class
inputStream new class that extends InputStream
我创建了一个新的 class,它扩展了 InputStream 并且必须 @Override read()。
我正在尝试使用方法 read(int b),但是当我使用它时,它会转到方法
read() 我不能使用参数,我通过了。
这是我的代码:
public class Run {
public static void main(String[] args) {
DFSMaze3dGenerator mg = new DFSMaze3dGenerator();
try {
Maze3d maze3d = mg.generate(1, 5, 5);
maze3d.print3DMaze();
OutputStream out = new MyCompressorOutputStream(
new FileOutputStream("1.maz"));
out.write(maze3d.toByteArray());
byte[] arr = maze3d.toByteArray();
System.out.println("");
for (int i = 0; i < arr.length; i++) {
System.out.print(arr[i] + ",");
}
out.close();
InputStream in = new MyDecompressorInputStream(new FileInputStream(
"1.maz"));
byte b[] = new byte[maze3d.toByteArray().length];
in.read(b);
in.close();
Maze3d loaded = new Maze3d(b);
System.out.println(loaded.equals(maze3d));
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
使用方法:read(b)时如何使用参数?
???
public class MyDecompressorInputStream extends InputStream {
InputStream in;
int count;
boolean even = false;
public MyDecompressorInputStream(InputStream in) {
super();
this.in = in;
}
@Override
public int read() throws IOException {
return 100;
}
}
InputStream.read(byte[])
呼叫 (MyDecompressorInputStream.
)read()
此外,您可能已经委托给in
:
@Override
public int read() throws IOException {
return in.read();
}
@Override
public void close() throws IOException {
return in.close();
}
您可能想要扩展 FilterInputStream。
一般来说,压缩 GzipInputStream 很好(.gz 格式)。
您是否需要子类化 InputStream? None 中的代码利用了您实现中添加的任何代码。但是,您应该在您的实现中实现 read(byte[]) 。这是在我的机器上运行的类似实现。
class MyInputStream extends InputStream {
InputStream in;
int count;
boolean even = false;
public MyInputStream(InputStream stream){
this.in = stream;
}
@Override
public int read() throws IOException {
return this.in.read();
}
@Override
public int read(byte[] toStore) throws IOException {
return this.in.read(toStore);
}
}
我的主要用法类似:
public static void main(String[] args){
MyInputStream stream = new MyInputStream(new ByteArrayInputStream(new byte[] {0, 0, 1}));
byte[] storage = new byte[3];
try {
stream.read(storage);
for (int i = 0; i < storage.length; ++i){
System.out.println(storage[i]); //0 0 1
}
} catch (IOException e) {
e.printStackTrace();
}
stream.close()
}
我创建了一个新的 class,它扩展了 InputStream 并且必须 @Override read()。 我正在尝试使用方法 read(int b),但是当我使用它时,它会转到方法 read() 我不能使用参数,我通过了。
这是我的代码:
public class Run {
public static void main(String[] args) {
DFSMaze3dGenerator mg = new DFSMaze3dGenerator();
try {
Maze3d maze3d = mg.generate(1, 5, 5);
maze3d.print3DMaze();
OutputStream out = new MyCompressorOutputStream(
new FileOutputStream("1.maz"));
out.write(maze3d.toByteArray());
byte[] arr = maze3d.toByteArray();
System.out.println("");
for (int i = 0; i < arr.length; i++) {
System.out.print(arr[i] + ",");
}
out.close();
InputStream in = new MyDecompressorInputStream(new FileInputStream(
"1.maz"));
byte b[] = new byte[maze3d.toByteArray().length];
in.read(b);
in.close();
Maze3d loaded = new Maze3d(b);
System.out.println(loaded.equals(maze3d));
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
使用方法:read(b)时如何使用参数? ???
public class MyDecompressorInputStream extends InputStream {
InputStream in;
int count;
boolean even = false;
public MyDecompressorInputStream(InputStream in) {
super();
this.in = in;
}
@Override
public int read() throws IOException {
return 100;
}
}
InputStream.read(byte[])
呼叫 (MyDecompressorInputStream.
)read()
此外,您可能已经委托给in
:
@Override
public int read() throws IOException {
return in.read();
}
@Override
public void close() throws IOException {
return in.close();
}
您可能想要扩展 FilterInputStream。
一般来说,压缩 GzipInputStream 很好(.gz 格式)。
您是否需要子类化 InputStream? None 中的代码利用了您实现中添加的任何代码。但是,您应该在您的实现中实现 read(byte[]) 。这是在我的机器上运行的类似实现。
class MyInputStream extends InputStream {
InputStream in;
int count;
boolean even = false;
public MyInputStream(InputStream stream){
this.in = stream;
}
@Override
public int read() throws IOException {
return this.in.read();
}
@Override
public int read(byte[] toStore) throws IOException {
return this.in.read(toStore);
}
}
我的主要用法类似:
public static void main(String[] args){
MyInputStream stream = new MyInputStream(new ByteArrayInputStream(new byte[] {0, 0, 1}));
byte[] storage = new byte[3];
try {
stream.read(storage);
for (int i = 0; i < storage.length; ++i){
System.out.println(storage[i]); //0 0 1
}
} catch (IOException e) {
e.printStackTrace();
}
stream.close()
}