Syntax error on token "Invalid Character", ; expected ?非法字符“；”為全角

out cannot be resolved or is not a field，這行新手理解起來可能比較困難，提示沒有找到out（屬性）。System打成String，運行時會調(diào)用System類下的out，實際上out是個Static類型內(nèi)部類。在調(diào)用out.println(..);

	public?static?void?main(String[]?args)?{
		String?a?=?"我愛慕課網(wǎng)";?//分號半角，Syntax?error?on?token?"Invalid?Character",?;?expected??
		String?b?=?"?//分號半角?

		System.out.println(a?+?"\n"?+?b);?//?String.out.println(a+"\n"+b);提示out?cannot?be?resolved?or?is?not?a?field，
	}