diff --git a/icu4j/src/com/ibm/icu/dev/tool/translit/SourceSet.java b/icu4j/src/com/ibm/icu/dev/tool/translit/SourceSet.java
new file mode 100644
index 00000000000..8556c98e023
--- /dev/null
+++ b/icu4j/src/com/ibm/icu/dev/tool/translit/SourceSet.java
@@ -0,0 +1,109 @@
+/*
+**********************************************************************
+*   Copyright (c) 2001, International Business Machines
+*   Corporation and others.  All Rights Reserved.
+**********************************************************************
+*   Date        Name        Description
+*   11/29/2001  aliu        Creation.
+*   06/26/2002  aliu        Moved to com.ibm.icu.dev.tool.translit
+**********************************************************************
+*/
+package com.ibm.icu.dev.tool.translit;
+import java.util.*;
+import com.ibm.icu.dev.tool.translit.UnicodeSetClosure;
+import java.io.*;
+import com.ibm.icu.text.*;
+
+/**
+ * Class that generates source set information for a transliterator.
+ * 
+ * To run, use:
+ * 
+ *   java com.ibm.icu.dev.tool.translit.SourceSet Latin-Katakana NFD lower
+ * 
+ * Output is produced in the command console, and a file with more detail is also written.
+ * 
+ * To see if it works, use:
+ * 
+ *   java com.ibm.icu.dev.test.translit.TransliteratorTest -v -nothrow TestIncrementalProgress
+ * 
+ * and
+ *  
+ *   java com.ibm.icu.dev.demo.translit.Demo
+ */
+public class SourceSet {
+
+    public static void main(String[] args) throws IOException {
+        if (args.length == 0) {
+            // Compute and display the source sets for all system
+            // transliterators.
+            for (Enumeration e = Transliterator.getAvailableIDs(); e.hasMoreElements(); ) {
+                String ID = (String) e.nextElement();
+                showSourceSet(ID, Normalizer.NO_OP, false);
+            }
+        } else {
+            // Usage: ID [NFKD | NFD] [lower]
+            Normalizer.Mode m = Normalizer.NO_OP;
+            boolean lowerFirst = false;
+            if (args.length >= 2) {
+                if (args[1].equalsIgnoreCase("NFD")) {
+                    m = Normalizer.DECOMP;
+                } else if (args[1].equalsIgnoreCase("NFKD")) {
+                    m = Normalizer.DECOMP_COMPAT;
+                } else {
+                    usage();
+                }
+            }
+            if (args.length >= 3) {
+                if (args[2].equalsIgnoreCase("lower")) {
+                    lowerFirst = true;
+                } else {
+                    usage();
+                }
+            }
+            if (args.length > 3) {
+                usage();
+            }
+            showSourceSet(args[0], m, lowerFirst);
+        }
+    }
+
+    static void showSourceSet(String ID, Normalizer.Mode m, boolean lowerFirst) throws IOException {
+        File f = new File("UnicodeSetClosure.txt");
+        String filename = f.getCanonicalFile().toString();
+        out = new PrintWriter(
+            new OutputStreamWriter(
+                new FileOutputStream(filename), "UTF-8"));
+        out.print('\uFEFF'); // BOM
+        System.out.println();
+        System.out.println("Writing " + filename);
+        Transliterator t = Transliterator.getInstance(ID);
+        showSourceSetAux(t, m, lowerFirst, true);
+        showSourceSetAux(t.getInverse(), m, lowerFirst, false);
+        out.close();
+    }
+    
+    static PrintWriter out;
+    
+    static void showSourceSetAux(Transliterator t, Normalizer.Mode m, boolean lowerFirst, boolean forward) throws IOException {
+        UnicodeSet sourceSet = t.getSourceSet();
+        if (m != Normalizer.NO_OP || lowerFirst) {
+            UnicodeSetClosure.close(sourceSet, m, lowerFirst);
+        }
+        System.out.println(t.getID() + ": " +
+                           sourceSet.toPattern(true));
+        out.println("# MINIMAL FILTER GENERATED FOR: " + t.getID() + (forward ? "" : " REVERSE"));
+        out.println(":: " 
+            + (forward ? "" : "( ") 
+            + sourceSet.toPattern(true) 
+            + (forward ? "" : " )")
+            + " ;");
+        out.println("# Unicode: " + sourceSet.toPattern(false));
+        out.println();
+    }
+
+    static void usage() {
+        System.err.println("Usage: ID [ NFD|NFKD [lower] ]");
+        System.exit(1);
+    }
+}