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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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2time.clear();
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5int day=time.getActualMaximum(Calendar.DAY_OF_MONTH);//±¾Ô·ݵÄÌìÊý
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