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 <K> Map<K, List<?>> copyNullSafeMultiHashMap(Map<? extends K, List<?>> map) {
    if (map == null)
        throw new NullPointerException("map");

    Map<K, List<?>> result = copyNullSafeMutableHashMap(map);
    for (Map.Entry<K, List<?>> entry : result.entrySet()) {
        List<?> value = entry.getValue();
        entry.setValue(Collections.unmodifiableList(new ArrayList<Object>(value)));
    }/* ww w .j a va2s .c  o m*/
    return result;
}

From source file:Main.java

public static <T> T requireNonNull(T o) {
    if (o == null) {
        throw new NullPointerException(o.getClass().getSimpleName() + " must not null");
    }//from   w w  w . j  a  v  a2s  .co m
    return o;
}

From source file:Main.java

/**
 * Method to clarify, that invoking {@code Runnable#run()} is really intented. This also prevents IDEs and other
 * tools from showing warnings./*from ww w  .j  a va2s.  com*/
 *
 * @param runnable
 */
public static void runInThisThread(Runnable runnable) {
    if (runnable == null) {
        throw new NullPointerException("runnable == null");
    }
    runnable.run();
}

From source file:Main.java

public static boolean isValidPhoneNumber(EditText paramEditText) {
    if (paramEditText == null) {
        throw new NullPointerException("EditText can't null");
    }//from w  ww .  j  a v a2  s  . c  o m
    return isValidPhoneNumber(paramEditText.getText().toString());
}

From source file:Main.java

public static boolean batteryPowerIsLow(Context context) {

    if (context == null)
        throw new NullPointerException("context cannot be null");

    final int PowerSaveThreshold = 20;

    int batteryLevel = getCurrentBatteryChargePercentage(context);

    return (batteryLevel <= PowerSaveThreshold) ? true : false;
}

From source file:Main.java

public static void hasPermission() {
    if (mContext == null)
        throw new NullPointerException("you must initialize in appliction to use: CCCoreUtil.init");
    PackageManager pm = mContext.getPackageManager();
    PackageInfo pInfo = null;/* w  w w.j  a v  a 2 s  .co  m*/
    try {
        pInfo = pm.getPackageInfo(mContext.getPackageName(), PackageManager.GET_PERMISSIONS);
        String[] permissions = pInfo.requestedPermissions;
        for (String permission : permissions) {
            if (TextUtils.equals(mContext.getPackageName() + ".permission." + "WANG_CC_CONG", permission))
                return;
        }
    } catch (Exception e) {
        // TODO: handle exception
        System.out.print("Authentication failed, you must register WANG_CC_CONG permission like:"
                + " <uses-permission android:name=\"PACKNAME.permission.WANG_CC_CONG\" />");
        throw new RuntimeException("you must register WANG_CC_CONG permission like:"
                + " <uses-permission android:name=\"PACKNAME.permission.WANG_CC_CONG\" />");
    }
    System.out.print("Authentication failed, you must register WANG_CC_CONG permission like:"
            + " <uses-permission android:name=\"PACKAGENAME.permission.WANG_CC_CONG\" />");
    throw new RuntimeException("you must register WANG_CC_CONG permission like:"
            + " <uses-permission android:name=\"PACKNAME.permission.WANG_CC_CONG\" />");
}

From source file:Main.java

public static void checkNotNull(Object object, String message) {
    if (TextUtils.isEmpty(message))
        message = "param check failed";
    if (object == null)
        throw new NullPointerException(message);
}

From source file:Main.java

public static <T> List<T> innerJoin(List<List<T>> list, BiFunction<T, T, T> function) {
    if (list == null || function == null) {
        throw new NullPointerException("list or function must not be null");
    }/*from   ww  w . java2  s  . com*/
    if (list.isEmpty()) {
        return Collections.emptyList();
    }
    if (list.size() == 1) {
        return list.get(0);
    }

    List<List<T>> result = innerJoin(list.get(0), list.get(1), function);
    if (list.size() == 2) {
        return merge(result);
    } else {
        for (int i = 2; i < list.size(); i++) {
            List<T> l1 = list.get(i);
            List<List<T>> temp = new ArrayList<>();
            result.stream().forEach(l -> temp.addAll(innerJoin(l, l1, function)));
            result = temp;
        }
        return merge(result);
    }
}

From source file:Main.java

/** Check if the app can be debugged or not */
public static boolean isDebugable(Context context) {
    if (isDebuggable == null) {
        if (context == null) {
            throw new NullPointerException("Context should not be null the first time.");
        }/* w ww  . j av  a  2  s  . c  o  m*/
        isDebuggable = (0 != (context.getApplicationInfo().flags & ApplicationInfo.FLAG_DEBUGGABLE));
    }
    return isDebuggable;
}

From source file:Main.java

static void checkCollectionForNulls(Collection<?> col) {
    for (Object entry : col) {
        if (entry == null) {
            throw new NullPointerException("collection contains a null entry");
        }// w  w  w . ja v a 2 s. c  o m
    }
}