• 2022-05-26
    ​下列程序段的运行结果是()​​ String str1 = “Good”;​​ String str2 = “morning”;​​ String str3 = str1.toLowerCase()+str2.toUpperCase();​​ System.out.println(str3);​​​
    A: Goodmorning
    B: gOODmORNING
    C: goodmorning
    D: goodMORNING