Java Programming Ideas Fourth Edition fourth chapter personal practice

Fourth. Exercise 1: (1) write a program that prints values from 1 to 100

public static void Main (string[] args) {test (100);} public static void Test (int num) {int i=0;while (i<num) {System.out.print (++i), if (i!=100) {System.out.print (",");}} SYSTEM.OUT.PRINTLN (); int J=0;do{system.out.print (++J), if (j!=100) {System.out.print (",");}} while (j<100); System.out.println (); for (int k=0;k<100;) {System.out.print (++k), if (k!=100) {System.out.print (",");}}}

Exercise 2: (2) write a program that generates 25 random numbers of type int, and for each random number, use the If-else statement to classify it as greater than, less than, or equal to a randomly generated value immediately following it.

public static void Main (string[] args) {test ();} public static void Test () {int num[] =new int[25];for (int i=0;i<25;i++) {random r=new random (); int n=r.nextint (); Num[i] =n;if (i>0) {compare (Num[i-1],num[i]);}}} public static void Compare (int n1,int n2) {//system.out.println (n1+ "," +n2+ "\ n n1>n2:" + (N1>N2) + "\ T" + "N1==N2:" + ( N1==N2) + "\ T" + "N1<N2:" + (N1<N2)), if (n1>n2) {System.out.println (n1+ "greater than" +n2);} else if (n1<n2) {System.out.println (n1+ "less than" +n2);} else {System.out.println (n1+ "equals" +n2);}}

Exercise 3: (1) Modify Exercise 2 to include the code in a while infinite loop. Then run it until you break it with the keyboard (usually by pressing CTRL + C).

public static void Main (string[] args) {test ();} public static void Test () {int num[] =new int[2];int i=0;boolean Flag=false;while (True) {random r=new random (); int N=r.next Int (); if (flag) {Num[i]=n;compare (num[0],num[1]);} Else{flag=true;num[i]=n;} i=i==0?1:0;}} public static void Compare (int n1,int n2) {//system.out.println (n1+ "," +n2+ "\ n n1>n2:" + (N1>N2) + "\ T" + "N1==N2:" + ( N1==N2) + "\ T" + "N1<N2:" + (N1<N2)), if (n1>n2) {System.out.println (n1+ "greater than" +n2);} else if (n1<n2) {System.out.println (n1+ "less than" +n2);} else {System.out.println (n1+ "equals" +n2);}}

Exercise 4: (3) write a program that uses two nested for loops and the remainder operator (%) to detect and print a prime number (an integer that can be divisible only by itself and 1 and not by other numbers).

       public static void Main (string[] args) {test (33);} public static Boolean test (int num) {for (int i=2;i<num;i++) {if (num%i==0) {System.out.println (num+ "Not a prime number"); return true;}} System.out.println (num+ "is Prime"); return false;}

Exercise 5: (4) Repeat Exercise 10 in chapter 3rd, instead of using the integer.tobinarystring () method, use the ternary and bitwise operators to display the binary 1 and 0.

Java Programming Ideas Fourth Edition fourth chapter personal practice