more classpath progress

classpath/java/io/ObjectInputStream.java

@@ -0,0 +1,21 @@
+package java.io;
+
+public class ObjectInputStream extends InputStream {
+  private final InputStream in;
+
+  public ObjectInputStream(InputStream in) {
+    this.in = in;
+  }
+
+  public int read() throws IOException {
+    return in.read();
+  }
+
+  public int read(byte[] b, int offset, int length) throws IOException {
+    return in.read(b, offset, length);
+  }
+
+  public void close() throws IOException {
+    in.close();
+  }
+}