How to get the selected index number when multiple data in JList is selected

Question

    try{
    f = new ProjectFile();

    numProject = f.getOutput();

    String[] projectData = new String[numProject.length];

//retrieving data from another file and store the title to projectData

        for (int i = 0; i < projectData.length; i++) {
            projectData[i] = numProject[i].getProjectTitle();
        }

        listProject.setListData(projectData);
        System.out.println(listProject.getSelectedIndex());
}catch(Exception e){
}

Answer 1

use getSelectedIndices() method

public int[] getSelectedIndices()

Returns an array of all of the selected indices, in increasing order.