当前分类: SCJP程序员认证考试
问题:单选题1. public class ForBar { 2. public static void main(String []args) { 3. int i = 0, j = 5; 4. tp: for (;;) { 5. i ++; 6. for(;;) 7. if(i --j) break tp; 8. } 9. system.out.printIn(“i = ” + i + “, j = “+ j); 10. } 11. } What is the resu...
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问题:public class X implements Runnable( private int x; priv...
问题:public class Item { private String desc; public String get...
问题:10. interface Foo {} 11. class Alpha implements Foo {} 12....
问题:Which two code fragments will execute the method doStuff() i...
问题:单选题public class X { public object m () { object o = new float (3.14F); object oa = new object [1]; oa[0]= o; o = null; oa[0] = null; return o; } } When is the float object created in line 3, eligible for garbage collection?()A Just af...
问题:单选题Which statement is true for the class java.util.ArrayList?()A The elements in the collection are ordered.B The collection is guaranteed to be immutable.C The elements in the collection are guaranteed to be unique.D The elements in the collection ar...
问题:单选题Which statements, when inserted at the indicated position in the following code, will cause a runtime exception when attempting to run the program?() class A {} class B extends A {} class C extends A {} public class Q3ae4 { public static void...
问题:public class Plant { private String name; public Plant(Str...
问题:单选题public class Test{ public static void main( String[] argv ){ // insert statement here } } Which statement, inserted at line 3, produces the following output?() Exception in thread “main” java.lang.AssertionError: true at Test.main(Test.java:3)A ...
问题:多选题11. public interface Status { 12. /* insert code here */ int MY_VALUE = 10; 13. } Which three are valid on line 12?()AfinalBstaticCnativeDpublicEprivateFabstractGprotected...
问题:Which statement is true?()...
问题:Which of these are keywords in Java?() ...
问题:int i = 0; while (true) { if(i==4) { break; } ++i; } S...
问题:public class X { public static void main(String [] args) { ...
问题:填空题3. string foo = “ABCDE”; 4. foo.substring(3); 5. foo.concat(“XYZ”); 6. Type the value of foo at line 6.()...
问题:public class Ball { public enum Color { RED, GREEN, BLUE };...
问题:单选题Which gets the name of the parent directory file “file.txt”?()A String name= File.getParentName(“file.txt”);B String name= (new File(“file.txt”)).getParent();C String name = (new File(“file.txt”)).getParentName();D String name= (new File(“file.txt”...
问题:单选题interface Animal { void soundOff(); } class Elephant implements Animal { public void soundOff() { System.out.println(“Trumpet”); } } class Lion implements Animal { public void soundOff() { System.out.println(“Roar”); } } class Alpha1 { sta...
问题:单选题for( int i = min; i A init i = min;while( i max ){}B int i = min; do system.out.println(i++); } while( i max );C for (int i=min; iD for (int i=; i++...