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private static int[] argumentTest(int[] input){
System.out.println("here come the input's items :");
for (int i : input)
System.out.print(i + " ");
System.out.println();
input = new int[]{1,2,3};
System.out.println("the input's reference has been changed here, you can see the current input's items :");
for (int i : input)
System.out.print(i + " ");
System.out.println();
return input;
}
public static void main(String[] args) {
int[] input = new int[]{3,2,1};
int[] output = argumentTest(input);
System.out.println("the input's reference has been changed in function argumentTest,but out of the function, the input remains the same as the one before invoked by argumentTest :");
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//String ddate=new SimpleDateFormat("yyyy-MM-dd HH:mm:ss").format(Calendar.getInstance().getTime());
TimeZone tz = TimeZone.getTimeZone("ETC/GMT-8");
TimeZone.setDefault(tz);
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