Which class contains the method for checking whether a file exists?

Show the output of the following code: String array = {“re…”…

The output from the following code is ________.java.util.ArrayList list = new java.util.ArrayList();list.add(“New York”);java.util.ArrayList list1 = list;list.add(“Atlanta”);list1.add(“Dallas”);System.out.println(list1);

Given two reference variables t1 and t2, if t1 == t2 is true, t1.equals(t2) must be ________.

What is the output of the following code?public class Test { public static void main(String[] args) { String s1 = new String(“Welcome to Java!”); String s2 = new String(“Welcome to Java!”); if (s1.equals(s2)) System.out.println(“s1 and s2 have the same contents”); else System.out.println(“s1 and s2 have different contents”); }}

Analyze the following code:public class Test { int x; public Test(String t) { System.out.println(“Test”); } public static void main(String[] args) { Test test = new Test(); System.out.println(test.x); }}

What is displayed by the following code? System.out.print(“Hi, ABC, good”.matches(“ABC “) + ” “); System.out.println(“Hi, ABC, good”.matches(“.*ABC.*”));

What exception type does the following program throw?public class Test { public static void main(String list = new int; System.out.println(list); }}

BigInteger and BigDecimal are immutable.

Suppose TestSimpleCircle and SimpleCircle in Listing 9.1 are in two separate files named TestSimpleCircle.java and SimpleCircle.java, respectively. What is the outcome of compiling TestsimpleCircle.java and then SimpleCircle.java?