单项选择题
public class X { public static void main (String[]args) { String s1 = new String (“true”); Boolean b1 = new Boolean (true); if (s2.equals(b1)) { System.out.printIn(“Equal”); } } } What is the result?()
A. The program runs and prints nothing. B. The program runs and prints “Equal” C. An error at line 5 causes compilation to fail. D. The program runs but aborts with an exception.
单项选择题 String foo = “blue”; Boolean[]bar = new Boolean [1]; if (bar[0]) { foo = “green”; } What is the result? ()
多项选择题 Whichtwovaliddeclarationsofachar?()
单项选择题 public class foo { static String s; public static void main (String[]args) { system.out.printIn (“s=” + s); } } What is the result?()