[Solved]Java Programs Please Help Complete Programs Java Programming Language Class Circle2 Step 2 Q37171463

Java programs: please help me complete these programs in Javaprogramming language.

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class Circle2 {// step 2: define a data fielddouble radius; //initialized to 0.0// step 3: define constructorspublic Circle2()???public Circle2(double newRadius) {radius = newRadius;}}classCircle3 {// step 2: define a data fielddouble radius; //initialized to 0.0// step 3: define constructorspublic Circle3(){???}public Circle3(double newRadius) {radius = newRadius;}}publicclass Constructors {public static void main(String[] args) {Circle2c2 = new Circle2(); // initialized to 0.0System.out.println(“1.1: “+ (c2.radius == ???));c2 = new Circle2(10); // initialized to10.0System.out.println(“1.2: ” + (c2.radius == ???));Circle3 c3 =new Circle3(); // initialized to 0.0System.out.println(“1.3: ” +(c3.radius == ???));c3 = new Circle3(20.0); // initialized to20.0System.out.println(“1.4: ” + (c3.radius == ???));}}/***output*/

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import java.util.Random;public class JavaUtilities {publicstatic void dateTest() {java.util.Date date =???System.out.println(“The elapsed time since Jan 1, 1970 is “+date.getTime() + “milliseconds”);System.out.println(date.toString());}public staticvoid randomTest() {Random random1 = ???System.out.print(“Fromrandom1: “);for (int i = 0; i < 10;i++)System.out.print(random1.??? + ” “);Random random2 =???System.out.print(“nFrom random2: “);for (int i = 0; i < 10;i++)System.out.print(random2.??? + ” “);}public static voidmain(String[] args) {dateTest();randomTest();}}/*** output*/

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class Test {public void hello() {}}class Test2 {Test t; // Whyis this an error?}public class NullPointerException {public staticvoid main(String[] args) {Test2 test2 = newTest2();test2.t.hello(); // we expect a runtime exception.NullPointError}}/*** output*/

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