//
// Source code recreated from a .class file by IntelliJ IDEA
// (powered by Fernflower decompiler)
//

package java.io;

public class FilterInputStream extends InputStream {
protected volatile InputStream in;

 protected FilterInputStream(InputStream in) {
this.in = in;
 }

public int read() throws IOException {
return this.in.read();
 }

public int read(byte[] b) throws IOException {
return this.read(b, 0, b.length);
 }

public int read(byte[] b, int off, int len) throws IOException {
return this.in.read(b, off, len);
 }

public long skip(long n) throws IOException {
return this.in.skip(n);
 }

public int available() throws IOException {
return this.in.available();
 }

public void close() throws IOException {
this.in.close();
 }

public synchronized void mark(int readlimit) {
this.in.mark(readlimit);
 }

public synchronized void reset() throws IOException {
this.in.reset();
 }

public boolean markSupported() {
return this.in.markSupported();
 }
}


봐도 잘 모르겠다는