Hello
Hello World
Compilation fails.
Hello World 5
The code runs with no output.
An exception is thrown at runtime.
第1题:
public class Foo { public void main (String args) { system.out.printIn(“Hello World.”); } } What is the result? ()
第2题:
public class Alpha{ public static void main( string[] args ){ if ( args.length == 2 ) { if ( args.[0].equalsIgnoreCase(“-b”) ) System.out.println( new Boolean( args[1] )); } } } And the code is invoked by using the command: java Alpha –b TRUE What is the result?()
第3题:
public class ClassA{public int getValue(){int value=0;boolean setting=true;String title="Hello";if(value||(setting && title=="Hello")){return 1;}if(value==1&title.equals("Hello")){return 2;}}}And:ClassA a=new ClassA();a.getValue();What is the result?()
A.1
B.2
C.Compilation fails.
D.The code runs with no output.
E.An exception is thrown at runtime.
第4题:
String a = null; a.concat(“abc”); a.concat(“def”); System.out.println(a); What is the result?()
第5题:
public class X { public static void main (String[]args) { string s = new string (“Hello”); modify(s); System.out.printIn(s); } public static void modify (String s) { s += “world!”; } } What is the result?()
第6题:
public class Foo { public void main( String[] args ) { System.out.println( “Hello” + args[0] ); } } What is the result if this code is executed with the command line?()
第7题:
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?()
第8题:
A.Compilation fails.
B.ClassC is displayed.
C.The code runs with no output.
D.An exception is thrown at runtime.
第9题:
10. public class Hello { 11. String title; 12. int value; 13. public Hello() { 14. title += “ World”; 15. } 16. public Hello(int value) { 17. this.value = value; 18. title = “Hello”; 19. Hello(); 20. } 21. } and: 30. Hello c = new Hello(5); 31. System.out.println(c.title); What is the result?()
第10题:
public class ClassA { public int getValue() { int value=0; boolean setting = true; String title=”Hello”; (value || (setting && title == “Hello”)) { return 1; } (value == 1 & title.equals(”Hello”)) { return 2; } } } And: ClassA a = new ClassA(); a.getValue(); What is the result?()