Compiling 2 source files to /storage/unus/Projects/jandev/ContactEditor/build/classes
/storage/unus/Projects/jandev/ContactEditor/src/my/upper/UpperUI.java:137: cannot find symbol
symbol  : class JFileChooser
location: class my.upper.UpperUI
        JFileChooser chooser = new javax.swing.JFileChooser();
/storage/unus/Projects/jandev/ContactEditor/src/my/upper/UpperUI.java:140: cannot find symbol
symbol  : class ExampleFileFilter
location: class my.upper.UpperUI
        ExampleFileFilter filter = new ExampleFileFilter();
/storage/unus/Projects/jandev/ContactEditor/src/my/upper/UpperUI.java:140: cannot find symbol
symbol  : class ExampleFileFilter
location: class my.upper.UpperUI
        ExampleFileFilter filter = new ExampleFileFilter();
/storage/unus/Projects/jandev/ContactEditor/src/my/upper/UpperUI.java:145: parent is not public in java.awt.Component; cannot be accessed from outside package
        int returnVal = chooser.showOpenDialog(parent);
/storage/unus/Projects/jandev/ContactEditor/src/my/upper/UpperUI.java:146: cannot find symbol
symbol  : variable JFileChooser
location: class my.upper.UpperUI
        if(returnVal == JFileChooser.APPROVE_OPTION) {
5 errors
BUILD FAILED (total time: 0 seconds)