文本视图的setText() nullPointer异常

TextView textView = findViewById(R.id.textView);
if (textView != null) {
    textView.setText("Hello World");
} else {
    Log.e("NullPointerException", "TextView is null");
}

Optional.ofNullable(textView).ifPresent(tv -> tv.setText("Hello World"));

TextView textView = findViewById(R.id.textView);
if (textView == null) {
    textView = new TextView(this);
    // 设置布局参数等
}
textView.setText("Hello World");

new Thread(new Runnable() {
    @Override
    public void run() {
        final String text = "Hello World";
        runOnUiThread(new Runnable() {
            @Override
            public void run() {
                TextView textView = findViewById(R.id.textView);
                if (textView != null) {
                    textView.setText(text);
                }
            }
        });
    }
}).start();