src/jdk.jcmd/share/classes/sun/tools/jstat/ColumnFormat.java

*** 1,7 ****
  /*
!  * Copyright (c) 2004, 2013, Oracle and/or its affiliates. All rights reserved.
   * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   *
   * This code is free software; you can redistribute it and/or modify it
   * under the terms of the GNU General Public License version 2 only, as
   * published by the Free Software Foundation.  Oracle designates this
--- 1,7 ----
  /*
!  * Copyright (c) 2004, 2018, Oracle and/or its affiliates. All rights reserved.
   * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   *
   * This code is free software; you can redistribute it and/or modify it
   * under the terms of the GNU General Public License version 2 only, as
   * published by the Free Software Foundation.  Oracle designates this
*** 39,48 ****
--- 39,49 ----
      private Alignment align = Alignment.CENTER;
      private Scale scale = Scale.RAW;
      private String format;
      private String header;
      private Expression expression;
+     private boolean required = false;
      private Object previousValue;
  
      public ColumnFormat(int number) {
          super("Column" + number);
          this.number = number;
*** 69,78 ****
--- 70,82 ----
          if (format == null) {
              // if no formating is specified, then the format is set to output
              // the raw data.
              format="0";
          }
+ 
+         // Adjust required flag
+         expression.setRequired(required);
      }
  
      public void setWidth(int width) {
          this.width = width;
      }
*** 119,128 ****
--- 123,140 ----
  
      public void setExpression(Expression e) {
          this.expression = e;
      }
  
+     public void setRequired(boolean r) {
+         this.required = r;
+     }
+ 
+     public boolean isRequired() {
+         return this.required;
+     }
+ 
      public void setPreviousValue(Object o) {
          this.previousValue = o;
      }
  
      public Object getPreviousValue() {
*** 139,149 ****
  
          System.out.println(indent + name + " {");
          System.out.println(indent + indentAmount + "name=" + name
                  + ";data=" + expression.toString() + ";header=" + header
                  + ";format=" + format + ";width=" + width
!                 + ";scale=" + scale.toString() + ";align=" + align.toString());
  
          for (Iterator<OptionFormat> i = children.iterator();  i.hasNext(); /* empty */) {
              OptionFormat of = i.next();
              of.printFormat(indentLevel+1);
          }
--- 151,162 ----
  
          System.out.println(indent + name + " {");
          System.out.println(indent + indentAmount + "name=" + name
                  + ";data=" + expression.toString() + ";header=" + header
                  + ";format=" + format + ";width=" + width
!                 + ";scale=" + scale.toString() + ";align=" + align.toString()
!                 + ";required=" + required);
  
          for (Iterator<OptionFormat> i = children.iterator();  i.hasNext(); /* empty */) {
              OptionFormat of = i.next();
              of.printFormat(indentLevel+1);
          }