use Horstmann's PS save not mine; it'll handle Japanese char etc.. this way.

runtime/Java/src/org/antlr/v4/runtime/RuleContext.java

@@ -268,15 +268,17 @@ public class RuleContext implements ParseTree.RuleNode {
 	public void save(Parser parser, String fileName)
 		throws IOException, PrintException
 	{
-		Trees.writePS(this, parser, fileName);
+		TreeViewer viewer = new TreeViewer(parser, this);
+		viewer.save(fileName);
+//		Trees.writePS(this, parser, fileName); // parrt routine
 	}
 
-	public void save(Parser parser, String fileName,
-					 String fontName, int fontSize)
-		throws IOException
-	{
-		Trees.writePS(this, parser, fileName, fontName, fontSize);
-	}
+//	public void save(Parser parser, String fileName,
+//					 String fontName, int fontSize)
+//		throws IOException
+//	{
+//		Trees.writePS(this, parser, fileName, fontName, fontSize);
+//	}
 
 	/** Print out a whole tree, not just a node, in LISP format
 	 *  (root child1 .. childN). Print just a node if this is a leaf.

runtime/Java/src/org/antlr/v4/runtime/misc/GraphicsSupport.java

@@ -30,7 +30,12 @@
 package org.antlr.v4.runtime.misc;
 
 import javax.imageio.ImageIO;
-import javax.print.*;
+import javax.print.DocFlavor;
+import javax.print.DocPrintJob;
+import javax.print.PrintException;
+import javax.print.PrintService;
+import javax.print.SimpleDoc;
+import javax.print.StreamPrintServiceFactory;
 import javax.print.attribute.HashPrintRequestAttributeSet;
 import javax.print.attribute.PrintRequestAttributeSet;
 import javax.swing.*;
@@ -105,6 +110,7 @@ public class GraphicsSupport {
 				job.print(doc, attributes);
 			}
 		} else {
+			// parrt: doesn't seem to do .pdf. 0-length file generated
 			Rectangle rect = comp.getBounds();
 			BufferedImage image = new BufferedImage(rect.width, rect.height,
 													BufferedImage.TYPE_INT_RGB);

runtime/Java/src/org/antlr/v4/runtime/tree/gui/TreeViewer.java

@@ -34,11 +34,13 @@ import org.abego.treelayout.TreeForTreeLayout;
 import org.abego.treelayout.TreeLayout;
 import org.abego.treelayout.util.DefaultConfiguration;
 import org.antlr.v4.runtime.Parser;
+import org.antlr.v4.runtime.misc.GraphicsSupport;
 import org.antlr.v4.runtime.misc.Utils;
 import org.antlr.v4.runtime.tree.ParseTree;
 import org.antlr.v4.runtime.tree.Tree;
 import org.antlr.v4.runtime.tree.Trees;
 
+import javax.print.PrintException;
 import javax.swing.*;
 import javax.swing.event.ChangeEvent;
 import javax.swing.event.ChangeListener;
@@ -47,6 +49,7 @@ import java.awt.event.ActionEvent;
 import java.awt.event.ActionListener;
 import java.awt.geom.CubicCurve2D;
 import java.awt.geom.Rectangle2D;
+import java.io.IOException;
 import java.util.ArrayList;
 import java.util.Collection;
 
@@ -324,7 +327,6 @@ public class TreeViewer extends JComponent {
         });
 	}
 
-	/** This does not always seem to render the postscript properly
 	public void save(String fileName) throws IOException, PrintException {
 		JDialog dialog = new JDialog();
 		Container contentPane = dialog.getContentPane();
@@ -335,10 +337,8 @@ public class TreeViewer extends JComponent {
 		dialog.pack();
 		dialog.setLocationRelativeTo(null);
 		dialog.dispose();
-//		dialog.setVisible(true);
 		GraphicsSupport.saveImage(this, fileName);
 	}
-	 */
 
 	// ---------------------------------------------------