以下程序段输出的结果是() public class test { public static void main(String[] args) { String str = "ABCDE"; str.substring(3); str.concat("XYZ"); System.out.println(str ); } }A.DEB.DEXYZC.ABCDED.CDEXYZ
以下程序段输出的结果是() public class test { public static void main(String[] args) { String str = "ABCDE"; str.substring(3); str.concat("XYZ"); System.out.println(str ); } }
A.DE
B.DEXYZ
C.ABCDE
D.CDEXYZ
参考答案和解析
D
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