more classpath progress

classpath/java/io/Reader.java

@@ -0,0 +1,22 @@
+package java.io;
+
+public abstract class Reader {
+  public int read() throws IOException {
+    char[] buffer = new char[1];
+    int c = read(buffer);
+    if (c <= 0) {
+      return -1;
+    } else {
+      return (int) buffer[0];
+    }
+  }
+
+  public int read(char[] buffer) throws IOException {
+    return read(buffer, 0, buffer.length);
+  }
+
+  public abstract int read(char[] buffer, int offset, int length)
+    throws IOException;
+
+  public abstract void close() throws IOException;
+}