public void testNPECrash() {
   String value = null;
   System.out.println("Length of str is: " + value.length());
}

- (void)testNPECrash {
    NSString *str = nil;
    NSInteger length = [str length];
    NSLog(@"Length of str is: %ld", length);
}

public void testANR() {
    try {
        Thread.sleep(20000); // Simulates a time-consuming operation.
    } catch (InterruptedException e) {
        e.printStackTrace();
    }
}

- (void)startLongRunningTask {
    dispatch_async(dispatch_get_main_queue(), ^{
        // Simulates a long-running task.
        [NSThread sleepForTimeInterval:20.0];
    });
}

public void simulateOOM() {
    List<byte[]> list = new ArrayList<>();
    while (true) {
        byte[] bytes = new byte[1024 * 1024]; // Allocates 1 MB of memory.
        list.add(bytes);
    }
}

- (void)simulateFOOM {
    NSMutableArray *array = [NSMutableArray array];
    while (true) {
        @autoreleasepool {
            NSString *string = [NSString stringWithFormat:@"%d", arc4random_uniform(1000000)];
            [array addObject:string];
        }
    }
}