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单选题
import java.io.PrintWriter; class DoFormat { public static void main(String [] args) { int x = 42; int y = 12345; float z = 7; System.out.format("-%4d- ", x); System.out.format("-%4d- ", y); System.out.format("-%4.1d- ", z); } } 结果为:()
A
编译失败
B
-42- -1234- -7.0-
C
- 42- -1234- - 7.0-
D
运行时异常被抛出
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更多 “单选题import java.io.PrintWriter; class DoFormat { public static void main(String [] args) { int x = 42; int y = 12345; float z = 7; System.out.format("-%4d- ", x); System.out.format("-%4d- ", y); System.out.format("-%4.1d- ", z); } } 结果为:()A 编译失败B -42- -1234- -7.0-C - 42- -1234- - 7.0-D 运行时异常被抛出” 相关考题
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import java.io.PrintWriter; class DoFormat { public static void main(String [] args) { int x = 42; int y = 12345; float z = 7; System.out.format("-%4d- ", x); System.out.format("-%4d- ", y); System.out.format("-%4.1d- ", z); } } 结果为:() A、编译失败B、-42- -1234- -7.0-C、- 42- -1234- - 7.0-D、运行时异常被抛出
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考题
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Import java.io.*;B
Include java.io.*;C
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Include java.io.PrintWriter;E
No statement is needed.
考题
单选题定义类: 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?()A
import utils.*;B
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Import java.io.PrintWriter;B
Include java.io.PrintWriter;C
Import java.io.OutputStreamWriter;D
Include java.io.OutputStreamWriter;E
No statement is needed.
考题
多选题package sun.scjp; public enum Color { RED, GREEN, BLUE } package sun.beta; // insert code here public class Beta { Color g = GREEN; public static void main( String[] argv) { System.out.println( GREEN); } } The class Beta and the enum Color are in different packages. Which two code fragments, inserted individually at line 2 of the Beta declaration, will allow this code to compile?()Aimport sun.scjp.Color.*;Bimport static sun.scjp.Color.*;Cimport sun.scjp.Color; import static sun.scjp.Color.*;Dimport sun.scjp.*; import static sun.scjp.Color.*;Eimport sun.scjp.Color; import static sun.scjp.Color.GREEN;
考题
单选题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”?()A
import utils.*;B
static import utils.*;C
importutils.Repetition.*;D
static importutils.Repetition.*;E
import utils.Repetition.twice();F
import static utils.Repetition.twice;G
static import utils.Repetition.twice;
考题
单选题现有 import java.io.PrintWriter; class DoFormat{ public static void main (String [] args) { int x=42; int y=12345; float Z-7 ; System.out.format("一%4d-", X); System. out.format("-%4d-", y); System. out.format("-%4.ld-",z); } } 结果为:()A
编译失败B
-42- -1234- -7.0-C
- 42- -1234- -7.0-D
- 42- -12345- -7.0-E
运行时异常被抛出
考题
单选题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”?()A
import utils.*;B
static import utils.*;C
import utils.Repetition.*;D
static import utils.Repetition. *;E
import utils.Repetition.twice();F
import static utils.Repetition.twice;G
static import utils.Repetition.twice;
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