Robot and Clipboard

import java.awt.AWTException;
import java.awt.Robot;
import java.awt.Toolkit;
import java.awt.datatransfer.Clipboard;
import java.awt.datatransfer.DataFlavor;
import java.awt.datatransfer.StringSelection;
import java.awt.datatransfer.Transferable;
import java.awt.datatransfer.UnsupportedFlavorException;
import java.awt.event.KeyEvent;
import java.io.IOException;
public class ClipManager {
private static Robot robot = null;
public Robot getRobot(){
if(robot==null){
try {
robot=new Robot();
} catch (AWTException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
return robot;
}
protected void pasteStringFromClipboard(String clipContent){
Clipboard clipboard = Toolkit.getDefaultToolkit().getSystemClipboard();
Transferable clipText = new StringSelection(clipContent);
clipboard.setContents(clipText, null);
}
public String getClipboardContents() {
String result = "";
//odd: the Object param of getContents is not currently used
Clipboard clipboard = Toolkit.getDefaultToolkit().getSystemClipboard();
Transferable contents = clipboard.getContents(null);
boolean hasTransferableText =
(contents != null) &&
contents.isDataFlavorSupported(DataFlavor.stringFlavor);
if ( hasTransferableText ) {
try {
//              DataFlavor[] dfs=contents.getTransferDataFlavors();
//              for(int i=0;i<dfs.length;i++){
//                  System.out.println(dfs[i].toString());
//              }
//              StringReader sr=(StringReader)contents.getTransferData(DataFlavor.plainTextFlavor);
//              int ch;
//              while((ch=sr.read())!=-1){
//                  result+=(char)ch;
//                  System.out.print((char)ch);
//              }
result = (String)contents.getTransferData(DataFlavor.stringFlavor);
}
catch (UnsupportedFlavorException ex){
//highly unlikely since we are using a standard DataFlavor
System.out.println(ex);
ex.printStackTrace();
}
catch (IOException ex) {
ex.printStackTrace();
}
}
return result;
}
public static void main(String[] args){
try {
Process p = Runtime.getRuntime().exec("java -v");
int exitCode=p.waitFor();
if(exitCode!=0){
System.out.println("Process failed!");
}
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
ClipManager cm=new ClipManager();
cm.pasteStringFromClipboard("aaa");
cm.getRobot().keyPress(KeyEvent.VK_ALT);
cm.getRobot().keyPress(KeyEvent.VK_TAB);
cm.getRobot().keyRelease(KeyEvent.VK_ALT);
cm.getRobot().keyRelease(KeyEvent.VK_TAB);
cm.getRobot().keyPress(KeyEvent.VK_CONTROL);
cm.getRobot().keyPress(KeyEvent.VK_C);
cm.getRobot().keyRelease(KeyEvent.VK_CONTROL);
cm.getRobot().keyRelease(KeyEvent.VK_C);
try {
Thread.sleep(5000);
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
//        cm.pasteStringFromClipboard("bbb");
System.out.println(cm.getClipboardContents());
}
}

 

Point here is CPU is too fast so that is why you

1) put p.waitfor() to wait the process finish running

2) Put thread.sleep(5000) to wait for the Ctrl+C to put the copied contents to clipboard.

    Note: Honestly 5000 is too long 200 will do the trick but I didn't modify the code because I'm lazy.