Example usage for java.lang NullPointerException NullPointerException

Introduction

In this page you can find the example usage for java.lang NullPointerException NullPointerException.

Prototype

public NullPointerException(String s)

Source Link

Document

Constructs a NullPointerException with the specified detail message.

Usage

From source file:Main.java

public static void frag2Act(Fragment fragment, Class<?> cls) {
    if (fragment == null || cls == null) {
        throw new NullPointerException("fragment or cls null");
    }//  w w  w.  ja  va  2 s. co  m
    Intent intent = new Intent(fragment.getActivity(), cls);
    fragment.startActivity(intent);
}

From source file:Main.java

public static boolean containsStringIgnoreCase(Collection<? extends String> strings, String string) {
    if (strings == null) {
        throw new NullPointerException("strings == null");
    }//from   w  w  w  .  j a  v  a  2s. c  om

    if (string == null) {
        throw new NullPointerException("string == null");
    }

    for (String s : strings) {
        if (string.equalsIgnoreCase(s)) {
            return true;
        }
    }

    return false;
}

From source file:Main.java

public static <K, V> Map<K, V> copyNullSafeMutableHashMap(Map<? extends K, ? extends V> map) {
    if (map == null)
        throw new NullPointerException("map");

    Map<K, V> result = new HashMap<K, V>(map);
    for (Map.Entry<K, V> entry : result.entrySet()) {
        if (entry.getKey() == null)
            throw new NullPointerException("entry.getKey()");
        if (entry.getValue() == null)
            throw new NullPointerException("entry.getValue()");
    }//  w  ww.j a  va  2s . c  o m
    return result;
}

From source file:Main.java

public static Frame findParentFrame(Component component) {
    if (component == null) {
        throw new NullPointerException("component == null");
    }//w w w  .  j  av a 2  s .c  o m
    Container parent = component.getParent();
    while (parent != null) {
        if ((parent instanceof Frame)) {
            return (Frame) parent;
        }
        parent = parent.getParent();
    }
    return null;
}

From source file:Main.java

public static boolean isSame(EditText paramEditText1, EditText paramEditText2) {
    if ((paramEditText1 == null) || (paramEditText2 == null)) {
        throw new NullPointerException("EditText can't null");
    }/*from   ww w  . ja  va 2  s.c om*/
    return isSame(paramEditText1.getText().toString(), paramEditText2.getText().toString());
}

From source file:Main.java

public static void parentWindowToFront(Component component) {
    if (component == null) {
        throw new NullPointerException("component == null");
    }//ww w  . j  a v a  2s .co m
    Container parent = component.getParent();
    while (parent != null) {
        if ((parent instanceof Window)) {
            Window parentWindow = (Window) parent;
            parentWindow.toFront();
            return;
        }
        parent = parent.getParent();
    }
}

From source file:Main.java

public static <T> T checkNotNull(T reference, @Nullable Object errorMessage) {
    if (reference == null) {
        throw new NullPointerException(String.valueOf(errorMessage));
    }/*from   w  ww .  ja  va 2s  .  c o m*/
    return reference;
}

From source file:Main.java

private static void ckeckNullPackageName(String packageName) {
    if (packageName == null || packageName.trim().length() == 0)
        throw new NullPointerException(ERROR_MESSAGE);
}

From source file:Main.java

public static <T> T requireNonNull(T object, String error) {
    if (object == null)
        throw new NullPointerException(error);

    return object;
}

From source file:Main.java

private static String getStringFromPrefsOrThow(SharedPreferences prefs, String key) {
    String val = prefs.getString(key, null);
    if (val == null) {
        throw new NullPointerException("Trying to retrieve pin value before it's been set");
    }//w w  w . j ava2 s  . c o  m
    return val;
}