Calendar cal = Calendar.getInstance();      
Calendar dt = Calendar.getInstance(); 
dt.clear();
dt.set(cal.get(Calendar.YEAR), cal.get(Calendar.MONTH),cal.get(Calendar.DATE)); 
return dt.getTime();        

在Kotlin

https://www.programiz.com/kotlin-programming/examples/current-date-time

fun main(args: Array<String>) {

val current = LocalDateTime.now()

val formatter = DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss.SSS")
val formatted = current.format(formatter)

println("Current Date and Time is: $formatted")}

它是简单的一行代码，用于以yyyy-MM-dd格式获取当前日期 你可以使用你想要的格式:

String date = new SimpleDateFormat("yyyy-MM-dd", Locale.getDefault()).format(new Date());

 String date = new SimpleDateFormat("yyyy-MM-dd").format(new Date());

//导入Date类为java.util

CharSequence s  = DateFormat.getDateInstance().format("MMMM d, yyyy ");

首先需要一个实例

  public static String getDateTime() {
        SimpleDateFormat simpleDateFormat = new SimpleDateFormat("MMMM dd, yyyy HH:mm:ss", Locale.getDefault());
        Date date = new Date();
        return simpleDateFormat.format(date);
    }