class BaseClass{ private float x= 1.0f; protected void setVar (float f) {x = f;} } class SubClass extends BaseClass { private float x = 2.0f; //insert code here 16. } Which two are valid examples of method overriding?()
AVoid setVar(float f) {x = f;}
BPublic void setVar(int f) {x = f;}
CPublic void setVar(float f) {x = f;}
DPublic double setVar(float f) {x = f;}
EPublic final void setVar(float f) {x = f;}
FProtected float setVar() {x=3.0f; return 3.0f; }
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What can directly access and change the value of the variable name?()
A、 any class
B、 only the Target class
C、 any class in the test package
D、 any class that extends Target
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int I=1, j=0 switch(i) { case 2: j+=6; case 4: j+=1; default: j +=2; case 0: j +=4; } What is the value of j at line 16?()
A0
B1
C2
D4
E6
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public class ForBar { public static void main(String args) { int i = 0, j = 5; tp: for (;;) { i ++; for(;;) if(i > --j) break tp; } system.out.printIn(“i = ” + i + “, j = “+ j); } } What is the result? ()
A、 The program runs and prints “i=1, j=0”
B、 The program runs and prints “i=1, j=4”
C、 The program runs and prints “i=3, j=4”
D、 The program runs and prints “i=3, j=0”
E、 An error at line 4 causes compilation to fail.
F、 An error at line 7 causes compilation to fail.
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class Base { Base() { System.out.print(“Base”); } } public class Alpha extends Base { public static void main( String[] args ) { new Alpha(); new Base(); } } What is the result?()
A、 Base
B、 BaseBase
C、 Compilation fails.
D、 The code runs with no output.
E、 An exception is thrown at runtime.
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Runnable r = new Runnable() { public void run() { System.out.print(”Cat”); } }; Threadt=new Thread(r) { public void run() { System.out.print(”Dog”); } }; t.start(); What is the result?()
A、 Cat
B、 Dog
C、 Compilation fails.
D、 The code runs with no output.
E、 An exception is thrown at runtime.