Given a class Repetition: 1.package utils; 2. 3.public class Repetition{ 4.public static String twice(Strings){returns+s;} 5.} and given another class Demo: 1.//insert code here2. 3.public class Demo{ 4.public static void main(String[]args){ 5.System.out.println(twice("pizza")); 6.} 7.} Which code should be inserted at line 1 of Demo.java to compile and run Demo to print“pizzapizza”?()
class Parser extends Utils { public static void main(String [] args) { System.out.print(new Parser().getInt("42")); } int getInt(String arg) { return Integer.parseInt(arg); } } class Utils { int getInt(String arg) throws Exception { return 42; } } 结果为:()
class Parser extends Utils { public static void main (String [] args) { try { System.out.print(new Parser().getInt("42")); } catch (NumberFormatException n) { System.out.println("NFExc "); } } int getInt(String arg) throws NumberFormatException { return Integer.parseInt(arg); } } class Utils { int getInt(String arg) { return 42; } } 结果为:()
现有: class Parser (类)extends(继承) Utils { public static void main(String [] args) { System.out.print(输出打印)(new Parser().getInt("42")); } int getInt(String arg) { return Integer.parseInt(arg); } } class Utils { int getInt(String arg) throws Exception { return 42; } } 结果为:()
Given a class Repetition: 1. package utils; 2. 3. public class Repetition { 4. public static String twice(String s) { return s + s; } 5. } and given another class Demo: 1. // insert code here 2. 3. public class Demo { 4. public static void main(String[] args) { 5. System.out.println(twice(”pizza”)); 6. } 7. } Which code should be inserted at line 1 of Demo.java to compile and run Demo to print“pizzapizza”?()
现有: class Parser extends Utils { public static void main (String[] args) { try{System.out.print (new Parser().getlnt("42")); } catch (Exception e) { System.out.println("Exc"); } } int getlnt (String arg) throws Exception { return Integer.parselnt (arg); } class Utils { int getlnt (String arg) {return 42; } } 结果为()
现有: class Parser extends Utils { public static void main(String [] args) { System.out.print(new Parser().getInt("42")); } int getInt(String arg) { return Integer.parseInt(arg); } } class Utils { int getInt(String arg) throws Exception { return 42; } } 结果为()
定义类: package utils; public class Rep{ public static String twice (String s){return s+s ;} } 再定义另一个类Demo: //insert code here public class Demo{ public static void main (String[] args){ System. out .println( twice( "Hello")); } } 在第一行插入哪项代码,可以使程序正常编译和执行?()
现有 class Parser extends Utils { public static void main (String [] args) { try { System.out.print (new Parser () .getlnt ("42")) } catch (Exception e) { System.out.println ("Exc") ; } } int getlnt (String arg) throws Exception { return Integer.parselnt (arg) ; } } class Utils { int getlnt () { return 42; } } 结果是什么?()