There are two character strings:s and t.s="My favor is computer",t=substr(s,9,5).Then the result after operation is
A.S="My favor is computer"; t="compu";
B.S="My favor is computer"; t="is co";
C.S="My favor"; t="is co";
D.S="My favor"; t="is computer";
第1题:
现有:importjava.util.*;classAddStuff2{publicstaticvoidmain(String[]args){TreeSett=newTreeSet();if(t.add("one"))if(t.add("two"))if(t.add("three"))add("four");for(Strings:t)System.out.print(s);}}结果为:()
A.one
B.onethreetwo
C.onetwothree
D.onetwothreefour
E.fouronethreetwo
F.编译失败
第2题:
下列哪个程序段可能导致错误?
A.String s="hello"; String t= "good"; String k=s+ t;
B.String s="hello"; String t; t=s[3]+"one";
C.String s="hello"; String standard=s. toUpperCase
D.String s="hello"; String t =s+ "good"
第3题:
下列的哪个程序段可能导致错误?
A.String s = "hello"; String t = "good"; String k = s + t;
B.String s = "hello"; String t; t = s[3] + "one";
C.String s = " hello "; String standard = s.toUpperCase( );
D.String s = "hello"; String t = s + "good";
第4题:
下列的哪个程序段可能导致错误? ( )
A.String s="hello"; String t="good"; String k=s+t;
B.String s="hello"; String t; t=s[3]+"one";
C.String s="hello"; String standard=s.toUpperCase();
D.String s="hello"; String t=s+"good";
第5题:
下面的哪些程序段可能导致错误? ( ) Ⅰ:String s="Gone with the wind"; String t="good"; String k=s+t; Ⅱ:String s="Gone with the wind"; String t; t=s[3]+"one"; Ⅲ:String s="Gone with the wind"; String standard=s.toUpperCase(); Ⅳ:String s="home directory"; String t=s-"directory";
A.Ⅱ、Ⅲ
B.Ⅱ、Ⅳ
C.Ⅰ、Ⅳ
D.Ⅲ、Ⅳ