e976. enabling text-dragging on a jtextcomponent.txt

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With text-dragging enabled, the user can select some text and drag the selected text to another part of the text component (or to another text component). During dragging, the text component's caret follows the cursor (but caret events are not fired). When the user releases the mouse, the selected text is deleted and inserted into the location of the caret. If the control key is pressed at the time the mouse button is released, the selected text is instead copied to the new location. 
    JTextComponent textComp = new JTextArea();
    textComp.setDragEnabled(true);