问如何从外部流访问数据

EN

import java.io.IOException;
import java.io.InputStream;

public class LittleEndianInputStream {
    private InputStream s;  

    public LittleEndianInputStream (InputStream in) { s = in; }

    boolean readBoolean() throws IOException {return (s.read() == 1);}

    int readInt() throws IOException {return s.read() | s.read() << 8 | s.read() << 16 | s.read() << 24; }

    char readChar() throws IOException {return (char)(s.read() | s.read() << 8); }

    String readString() throws IOException {
        int len = readInt();
        char [] tarray = new char[len];
        for (int i = 0; i < len; i++ ) tarray[i] = readChar();
        return new String(tarray);
    }
}