多項(xiàng)選擇題

Which lines of code are valid declarations of a native method when occurring within the declaration of the following class？（）
public class Qf575 {
// insert declaration of a native method here
}

A.native public void setTemperature（int kelvin）；
B.private native void setTemperature（int kelvin）；
C.protected int native getTemperature（）；
D.public abstract native void setTemperature（int kelvin）；
E.native int setTemperature（int kelvin） {}

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單項(xiàng)選擇題

What will be written to the standard output when the following program is run？（）
class Base { int i； Base（） {
add（1）；
}
void add（int v） { i += v； }
void print（） { System.out.println（i）； }
}
class Extension extends Base { Extension（） { add（2）； }
void add（int v） { i += v*2； } }
public class Qd073 {
public static void main（String args[]） { bogo（new Extension（））； }
static void bogo（Base b） { b.add（8）； b.print（）；
}
}

A.9
B.18
C.20
D.21
E.22

單項(xiàng)選擇題

What does the value returned by the method getID（） found in class java.awt.AWTEvent uniquely identify？（）

A.The particular event instance.
B.The source of the event.
C.The set of events that were triggered by the same action.
D.The type of event.
E.The type of component from which the event originated.

Which lines of code are valid declarations of a native method when occurring within the declaration of the following class？（） public class Qf575 { // insert declaration of a native method here }

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What does the value returned by the method getID（） found in class java.awt.AWTEvent uniquely identify？（）

Which lines of code are valid declarations of a native method when occurring within the declaration of the following class？（）
public class Qf575 {
// insert declaration of a native method here
}