try catch放在循环内还是放在循环外的性能对比.

public static void main(String[] args)
	{
		Main ins = new Main();
		int size = 10000000;
		
		ins.method1(size);
		ins.method2(size);
		ins.method3(size);
	}
	public void method1(int size)
	{
		long start = System.currentTimeMillis();
		ArrayList<String> al = new ArrayList<String>();
		String str = null;
		try
		{
			for (int i = 0; i < size; i++)
			{
				str = "str" + i;
				al.add(str);
			}
		}
		catch (Exception e)
		{
		}
		System.out.println("method1 total: " + (System.currentTimeMillis() - start));
	}
	public void method2(int size)
	{
		long start = System.currentTimeMillis();
		ArrayList<String> al = new ArrayList<String>();
		String str = null;
		for (int i = 0; i < size; i++)
		{
			try
			{
				str = "str" + i;
				al.add(str);
			}
			catch (Exception e)
			{
			}
		}
		System.out.println("method2 total: " + (System.currentTimeMillis() - start));
	}
	public void method3(int size)
	{
		long start = System.currentTimeMillis();
		ArrayList<String> al = new ArrayList<String>();
		String str = null;
		for (int i = 0; i < size; i++)
		{
			str = "str" + i;
			al.add(str);
		}
		System.out.println("method3 total: " + (System.currentTimeMillis() - start));
	}