String[] subjects =new String[5]                    ;         // 分别为数组中的元素赋值 subjects[0] = "Oracle"; subjects[1] = "PHP"; subjects[2] = "Linux"; subjects[3] = "Java"; subjects[4] = "HTML";         System.out.println("数组中第4个科目为：" + subject[3]          ); } }怎么过不了。