以下抽象类的定义中,错误的是
A: abstract class Demo1{}
B: abstract class Demo2{
public abstract String fun(String a);
}
C: abstract class Demo3{
public String fun(){
return "dlvtc";
}
}
D: abstract class Demo4{
public static final String str= "dlvtc";
abstract void fun(){}
}
A: abstract class Demo1{}
B: abstract class Demo2{
public abstract String fun(String a);
}
C: abstract class Demo3{
public String fun(){
return "dlvtc";
}
}
D: abstract class Demo4{
public static final String str= "dlvtc";
abstract void fun(){}
}
举一反三
- 以下抽象类的定义中,错误的是?() A: abstract class Demo1{ } B: abstract class Demo2{ public abstract String fun(String a); } C: abstract class Demo3{ public String fun(){ return "abc"; } } D: abstract class Demo4{ public static final String str = "abcde"; abstract void fun(){} }
- 以下抽象类的定义中,错误的是? A: abstract class Demo1{} B: abstract class Demo2{ public abstract String fun(String a); } C: abstract class Demo3{ public String fun(){ return \ D: abstract class Demo4{ public static final String CZBK = \高等教育 \
- 以下抽象类的定义中,错误的是?() A: abstract class Demo1{} B: abstract class Demo2{ public abstract String fun(String a); } C: abstract class Demo3{ public String fun(){ return "CZBK"; } } D: abstract class Demo4{ public static final String CZBK = "传智播客"; abstract void fun(){} }
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- 下列哪个类声明是正确的() A: public<br/>abstract class Car{…} B: abstract<br/>private move( ){…} C: protected<br/>private number; D: abstract<br/>final class H1{…}