ExpandableComposite ec = toolkit.createExpandableComposite(body,

                ExpandableComposite.TREE_NODE

                       | ExpandableComposite.CLIENT_INDENT);

              ec.setText("Expandable Composite title");

              String ctext = "We will now create a somewhat long text so that "

                + "we can use it as content for the expandable composite. "

                + "Expandable composite is used to hide or show the text using the "

                + "toggle control";

              Label client = toolkit.createLabel(ec, ctext, SWT.WRAP);

              ec.setClient(client);

              td = new TableWrapData();

              td.colspan = 2;

              ec.setLayoutData(td);

              ec.addExpansionListener(new ExpansionAdapter() {

                public void expansionStateChanged(ExpansionEvent e) {

                       form.reflow(true);

                }

              });

              Section section = toolkit.createSection(body, Section.DESCRIPTION

                       | Section.TWISTIE | Section.EXPANDED);

              td = new TableWrapData(TableWrapData.FILL);

              td.colspan = 2;

              section.setLayoutData(td);

              section.addExpansionListener(new ExpansionAdapter() {

                public void expansionStateChanged(ExpansionEvent e) {

                       form.reflow(true);

                }

              });

              section.setText("Section title");

              toolkit.createCompositeSeparator(section);

              section

                       .setDescription("This is the description that goes below the title");

              Composite sectionClient = toolkit.createComposite(section);

              sectionClient.setLayout(new GridLayout());

              button = toolkit.createButton(sectionClient, "Radio 1", SWT.RADIO);

              button = toolkit.createButton(sectionClient, "Radio 2", SWT.RADIO);

              section.setClient(sectionClient);

              link.setText("This is an example of a form that is much longer and will need to wrap.");

       public void createPartControl(Composite parent) {

              toolkit = new FormToolkit(parent.getDisplay());

              form = toolkit.createScrolledForm(parent);

              form.setText("Hello, Eclipse Forms");

              Composite body = form.getBody();

              TableWrapLayout layout = new TableWrapLayout();

              body.setLayout(layout);

              Hyperlink link = toolkit.createHyperlink(body, "Click here.", SWT.WRAP);

              link.addHyperlinkListener(new HyperlinkAdapter() {

                public void linkActivated(HyperlinkEvent e) {

                       System.out.println("Link activated!");

                }

              });

              layout.numColumns = 2;

              link.setText("This is an example of a form that is much longer and will need to wrap.");

              TableWrapData td = new TableWrapData();

              td.colspan = 2;

              link.setLayoutData(td);

              Label label = toolkit.createLabel(body, "Text field label:");

              Text text = toolkit.createText(body, "");

              td = new TableWrapData(TableWrapData.FILL_GRAB);

              text.setLayoutData(td);

              text.setData(FormToolkit.KEY_DRAW_BORDER, FormToolkit.TEXT_BORDER);

              Button button = toolkit.createButton(body,

                       "An example of a checkbox in a form", SWT.CHECK);

              td = new TableWrapData();

              td.colspan = 2;

              button.setLayoutData(td);

              toolkit.paintBordersFor(body);

       }

public class EnvTest {

       public static void main(String[] args) {

           System.out.println(System.getenv("JAVA_HOME"));

       }

}

E:\develop\j2sdk1.4.2_05

public class EnvDump {

       public static void main(String[] args) {

              for (Entry entry : System.getenv().entrySet()) {

                System.out.println(entry.getKey() + "=" + entry.getValue());

              }

       }

}

public class ProcessTest {

       public static void main(String[] args) throws IOException {

          Process p = new ProcessBuilder(“C:\\Program Files\\EditPlus 2\\editplus.exe”).start();

       }

}

public class ProcessTest {

       public static void main(String[] args) throws IOException {

                  Process p = new ProcessBuilder("ping", "sina.com.cn").start();

                  InputStream is = p.getInputStream();

              BufferedReader br = new BufferedReader(new InputStreamReader(is));

              String line;

              while ((line = br.readLine()) != null) {

                System.out.println(line);

              }

       }

}

ProcessBuilder pb = new ProcessBuilder("myCommand", "myArg1", "myArg2");

Map<String, String> env = pb.environment();

env.put("VAR1", "myValue");

env.remove("OTHERVAR");

env.put("VAR2", env.get("VAR1") + "suffix");

pb.directory("myDir");

Process p = pb.start();