Example usage for javax.swing JTextArea replaceSelection

Introduction

In this page you can find the example usage for javax.swing JTextArea replaceSelection.

Prototype

public void replaceSelection(String content) 

Source Link

Document

Replaces the currently selected content with new content represented by the given string.

Usage

From source file:Main.java

public static void main(String[] argv) throws Exception {
    JTextArea comp = new JTextArea();
    String actionName = "Lowercase";

    JFrame f = new JFrame();
    f.add(new JScrollPane(comp));
    f.setSize(300, 300);/*w  w w .ja v a2s .c om*/
    f.setVisible(true);
    comp.getInputMap().put(KeyStroke.getKeyStroke("F2"), actionName);

    comp.getActionMap().put(actionName, new TextAction(actionName) {
        public void actionPerformed(ActionEvent evt) {
            JTextComponent comp = getTextComponent(evt);

            if (comp.getSelectionStart() == comp.getSelectionEnd()) {
                if (comp.getCaretPosition() < comp.getDocument().getLength()) {
                    try {
                        int pos = comp.getCaretPosition();
                        Document doc = comp.getDocument();
                        String str = doc.getText(pos, 1).toLowerCase();

                        doc.remove(pos, 1);
                        doc.insertString(pos, str, null);
                        comp.moveCaretPosition(pos + 1);
                    } catch (Exception e) {
                        System.out.println();
                    }
                }
            } else {
                int s = comp.getSelectionStart();
                int e = comp.getSelectionEnd();

                comp.replaceSelection(comp.getSelectedText().toLowerCase());
                comp.select(s, e);
            }
        }
    });
}

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From source file:DragFileDemo.java

public boolean importData(JComponent c, Transferable t) {
    JTextArea tc;

    if (!canImport(c, t.getTransferDataFlavors())) {
        return false;
    }/*from  w  w w .j av  a 2 s.c o m*/
    //A real application would load the file in another
    //thread in order to not block the UI. This step
    //was omitted here to simplify the code.
    try {
        if (hasFileFlavor(t.getTransferDataFlavors())) {
            String str = null;
            java.util.List files = (java.util.List) t.getTransferData(fileFlavor);
            for (int i = 0; i < files.size(); i++) {
                File file = (File) files.get(i);
                //Tell the tabbedpane controller to add
                //a new tab with the name of this file
                //on the tab. The text area that will
                //display the contents of the file is returned.
                tc = tpc.addTab(file.toString());

                BufferedReader in = null;

                try {
                    in = new BufferedReader(new FileReader(file));

                    while ((str = in.readLine()) != null) {
                        tc.append(str + newline);
                    }
                } catch (IOException ioe) {
                    System.out.println("importData: Unable to read from file " + file.toString());
                } finally {
                    if (in != null) {
                        try {
                            in.close();
                        } catch (IOException ioe) {
                            System.out.println("importData: Unable to close file " + file.toString());
                        }
                    }
                }
            }
            return true;
        } else if (hasStringFlavor(t.getTransferDataFlavors())) {
            tc = (JTextArea) c;
            if (tc.equals(source) && (tc.getCaretPosition() >= p0.getOffset())
                    && (tc.getCaretPosition() <= p1.getOffset())) {
                shouldRemove = false;
                return true;
            }
            String str = (String) t.getTransferData(stringFlavor);
            tc.replaceSelection(str);
            return true;
        }
    } catch (UnsupportedFlavorException ufe) {
        System.out.println("importData: unsupported data flavor");
    } catch (IOException ieo) {
        System.out.println("importData: I/O exception");
    }
    return false;
}

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