Java中，以下代码会报错会报错的两项是（）
A: String s = "Gone with the wind"; String t = " good "; String k = s + t;
B: String s = "Gone with the wind"; String t; t = s[3] + "one";
C: String s = "Gone with the wind"; String standard = s.toUpperCase();
D: String s = "home directory"; String t = s - "directory";
A: String s = "Gone with the wind"; String t = " good "; String k = s + t;
B: String s = "Gone with the wind"; String t; t = s[3] + "one";
C: String s = "Gone with the wind"; String standard = s.toUpperCase();
D: String s = "home directory"; String t = s - "directory";
举一反三
- 下面的哪些程序片断可能导致错误（） A: String s = "Gone with the wind"； String t = " good "； String k = s + t； B: String s = "Gone with the wind"； String t； t = s[3] + "one"； C: String s = "Gone with the wind"； String standard = s.toUpperCase（）； D: String s = "home directory"； String t = s - "directory"
- 下面的哪些程序片断可能导致错误？（ ）。 A: String s="Gone with the wind";String t;t=s[3]+"one"; B: String s="Gone with the wind";String t="good";String k=s+t; C: String s="Gone with the wind";String standard=s.toUpperCase(); D: String s="home directory";String t=s-"directory";
- 下面的哪些程序片断可能导致错误?( ) A: String s=”Hello”; String t=,,World"; String k=s+t; B: String s=,,Hello";String t;t=s[3]+"one"; C: String s="Hello,,;String standard = s.tollpperCase(); D: String s="Hello World”;String t=s-”World”;
- 若String s = “Hello” ; String t = “Hello”;String c=new String(s);则下列哪个表达式返回false？（ ） A: s.equals(t); B: t.equals(c); C: s==c; D: s==t;
- 若有语句String s="Hello, ";String t=s;s="Java! ";则t指向的字符串为（）。 A: Hello， B: Java！ C: Hello，Java！ D: 都不对