JFileChooser.setMultiSelectionEnabled(boolean b) has the following syntax.
public void setMultiSelectionEnabled(boolean b)
In the following code shows how to use JFileChooser.setMultiSelectionEnabled(boolean b) method.
/*w ww .j av a 2 s. c o m*/ import java.io.File; import javax.swing.JFileChooser; public class Main { public static void main(String[] argv) { JFileChooser chooser = new JFileChooser(); chooser.setMultiSelectionEnabled(true); chooser.showOpenDialog(null); File[] files = chooser.getSelectedFiles(); } }