JList.java 文件源码

/**
 * Returns an array of all of the selected indices, in increasing
 * order.
 *
 * @return all of the selected indices, in increasing order,
 *         or an empty array if nothing is selected
 * @see #removeSelectionInterval
 * @see #addListSelectionListener
 */
@Transient
public int[] getSelectedIndices() {
    ListSelectionModel sm = getSelectionModel();
    int iMin = sm.getMinSelectionIndex();
    int iMax = sm.getMaxSelectionIndex();

    if ((iMin < 0) || (iMax < 0)) {
        return new int[0];
    }

    int[] rvTmp = new int[1+ (iMax - iMin)];
    int n = 0;
    for(int i = iMin; i <= iMax; i++) {
        if (sm.isSelectedIndex(i)) {
            rvTmp[n++] = i;
        }
    }
    int[] rv = new int[n];
    System.arraycopy(rvTmp, 0, rv, 0, n);
    return rv;
}