Example usage for java.util.prefs Preferences getFloat

Introduction

In this page you can find the example usage for java.util.prefs Preferences getFloat.

Prototype

public abstract float getFloat(String key, float def);

Source Link

Document

Returns the float value represented by the string associated with the specified key in this preference node.

Usage

From source file:Main.java

public static void main(String[] argv) throws Exception {
    Preferences prefs = Preferences.userNodeForPackage(Main.class);

    // Preference key name
    final String PREF_NAME = "name_of_preference";

    // Save/*from   w  w  w. ja va 2 s.c  o m*/
    prefs.put(PREF_NAME, "a string"); // String
    prefs.putBoolean(PREF_NAME, true); // boolean
    prefs.putInt(PREF_NAME, 123); // int
    prefs.putLong(PREF_NAME, 123L); // long
    prefs.putFloat(PREF_NAME, 12.3F); // float
    prefs.putDouble(PREF_NAME, 12.3); // double
    byte[] bytes = new byte[1024];
    prefs.putByteArray(PREF_NAME, bytes); // byte[]

    // Retrieve
    String s = prefs.get(PREF_NAME, "a string"); // String
    boolean b = prefs.getBoolean(PREF_NAME, true); // boolean
    int i = prefs.getInt(PREF_NAME, 123); // int
    long l = prefs.getLong(PREF_NAME, 123L); // long
    float f = prefs.getFloat(PREF_NAME, 12.3F); // float
    double d = prefs.getDouble(PREF_NAME, 12.3); // double
    bytes = prefs.getByteArray(PREF_NAME, bytes); // byte[]
}

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From source file:edu.umd.cs.findbugs.gui2.GUISaveState.java

public static void loadInstance() {
    GUISaveState newInstance = new GUISaveState();
    newInstance.recentFiles = new ArrayList<File>();
    Preferences p = Preferences.userNodeForPackage(GUISaveState.class);

    newInstance.tabSize = p.getInt(TAB_SIZE, 4);

    newInstance.fontSize = p.getFloat(FONT_SIZE, 12.0f);

    newInstance.starterDirectoryForLoadBugs = new File(
            p.get(GUISaveState.STARTERDIRECTORY, SystemProperties.getProperty("user.dir")));

    int prevCommentsSize = p.getInt(GUISaveState.PREVCOMMENTSSIZE, 0);

    for (int x = 0; x < prevCommentsSize; x++) {
        String comment = p.get(GUISaveState.COMMENTKEYS[x], "");
        newInstance.previousComments.add(comment);
    }//w w w .  j  a va  2 s.  co m

    int size = Math.min(MAXNUMRECENTPROJECTS, p.getInt(GUISaveState.NUMPROJECTS, 0));
    for (int x = 0; x < size; x++) {
        newInstance.addRecentFile(new File(p.get(GUISaveState.RECENTPROJECTKEYS[x], "")));
    }

    int sorterSize = p.getInt(GUISaveState.SORTERTABLELENGTH, -1);
    if (sorterSize != -1) {
        ArrayList<Sortables> sortColumns = new ArrayList<Sortables>();
        String[] sortKeys = GUISaveState.generateSorterKeys(sorterSize);
        for (int x = 0; x < sorterSize; x++) {
            Sortables s = Sortables.getSortableByPrettyName(p.get(sortKeys[x], "*none*"));

            if (s == null) {
                if (MainFrame.GUI2_DEBUG) {
                    System.err.println("Sort order was corrupted, using default sort order");
                }
                newInstance.useDefault = true;
                break;
            }
            sortColumns.add(s);
        }
        if (!newInstance.useDefault) {
            // add in default columns
            Set<Sortables> missingSortColumns = new HashSet<Sortables>(Arrays.asList(DEFAULT_COLUMN_HEADERS));
            missingSortColumns.removeAll(sortColumns);
            sortColumns.addAll(missingSortColumns);
            newInstance.sortColumns = sortColumns.toArray(new Sortables[sortColumns.size()]);
        }
    } else {
        newInstance.useDefault = true;
    }

    newInstance.dockingLayout = p.getByteArray(DOCKINGLAYOUT, new byte[0]);

    String boundsString = p.get(FRAME_BOUNDS, null);
    Rectangle r = new Rectangle(0, 0, 800, 650);
    if (boundsString != null) {
        String[] a = boundsString.split(",", 4);
        if (a.length > 0) {
            try {
                r.x = Math.max(0, Integer.parseInt(a[0]));
            } catch (NumberFormatException nfe) {
                assert true;
            }
        }
        if (a.length > 1) {
            try {
                r.y = Math.max(0, Integer.parseInt(a[1]));
            } catch (NumberFormatException nfe) {
                assert true;
            }
        }
        if (a.length > 2) {
            try {
                r.width = Math.max(40, Integer.parseInt(a[2]));
            } catch (NumberFormatException nfe) {
                assert true;
            }
        }
        if (a.length > 3) {
            try {
                r.height = Math.max(40, Integer.parseInt(a[3]));
            } catch (NumberFormatException nfe) {
                assert true;
            }
        }
    }
    newInstance.frameBounds = r;
    newInstance.extendedWindowState = p.getInt(EXTENDED_WINDOW_STATE, Frame.NORMAL);

    newInstance.splitMain = p.getInt(SPLIT_MAIN, 400);
    newInstance.splitSummary = p.getInt(SPLIT_SUMMARY_NEW, 400);
    newInstance.splitTop = p.getInt(SPLIT_TOP, -1);
    newInstance.splitTreeComments = p.getInt(SPLIT_TREE_COMMENTS, 250);
    newInstance.packagePrefixSegments = p.getInt(PACKAGE_PREFIX_SEGEMENTS, 3);

    String plugins = p.get(CUSTOM_PLUGINS, "");
    if (plugins.length() > 0) {
        for (String s : plugins.split(" ")) {
            try {
                URI u = new URI(s);
                Plugin.addCustomPlugin(u);
                newInstance.customPlugins.add(u);
            } catch (PluginException e) {
                assert true;
            } catch (URISyntaxException e) {
                assert true;
            }
        }
    }

    String enabledPluginsString = p.get(ENABLED_PLUGINS, "");
    String disabledPluginsString = p.get(DISABLED_PLUGINS, "");
    newInstance.enabledPlugins = new ArrayList<String>(Arrays.asList(enabledPluginsString.split(",")));
    newInstance.disabledPlugins = new ArrayList<String>(Arrays.asList(disabledPluginsString.split(",")));

    instance = newInstance;
}

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