--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/goodjava/io/DataInputStream.java	Sat May 02 22:25:56 2020 -0600
@@ -0,0 +1,20 @@
+package goodjava.io;
+
+import java.io.InputStream;
+import java.io.IOException;
+import java.nio.charset.StandardCharsets;
+
+
+public class DataInputStream extends java.io.DataInputStream {
+
+	public DataInputStream(InputStream in) {
+		super(in);
+	}
+
+	public String readString() throws IOException {
+		int len = readInt();
+		byte[] a = new byte[len];
+		readFully(a);
+		return new String(a,StandardCharsets.UTF_8);
+	}
+}