读代码:public class foo {static String s;public static void main (String[]args) {System.out.println (“s=” + s);}}结果是： A: The code compiles, but a NullPointerException is thrown when toString is called B: The code compiles and “s=null” is printed C: The code does not compile because string s cannot be referenced D: The code does not compile because string s is not initialized E: The code compiles and “s=” is printed

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2022-06-07 问题

读代码:public class foo {static String s;public static void main (String[]args) {System.out.println (“s=” + s);}}结果是： A: The code compiles, but a NullPointerException is thrown when toString is called B: The code compiles and “s=null” is printed C: The code does not compile because string s cannot be referenced D: The code does not compile because string s is not initialized E: The code compiles and “s=” is printed

2022-06-07 问题

According to the shape and processing requirements, programmer compiles machining process into machining program.（） A: 对 B: 错

2022-06-06 问题

Which command compiles the Java source code file Welcome.java? ( ) A: cd Welcome.java B: javac Welcome.java C: java Welcome.java D: compile Welcome.java

2022-06-03 问题

Which statement is true？（） A: Compilation succeeds. B: class A does not compile. C: The method declared on line 9 cannot be modified to throw TestException. D: TestA compiles if line 10 is enclosed in try/catch block that catches TestException.

Which statement is true？（） A: Compilation succeeds. B: class A does not compile. C: The method declared on line 9 cannot be modified to throw TestException. D: TestA compiles if line 10 is enclosed in try/catch block that catches TestException.