CORE JAVA BASIC PROGRAMMING PROBLEMS FOR BEGINNERS PDF1. Learn all java programming concepts to crack java interviews and tests

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1 CORE JAVA BASIC PROGRAMMING PROBLEMS FOR BEGINNERS PDF1 Learn all java programming concepts to crack java interviews and tests

2 //Java Program to Print Multiplication Table of a Given Number import java.util.scanner; public class MultiplicationTable Scanner sc = new Scanner(System.in); System.out.print("Enter the number whose multiplication is required..."); int num = sc.nextint(); for(int i = 1; i <= 20; i++) System.out.println(num+"*"+i+" = "+(num*i));

3 //Java Program to Print Area of Triangle using Heron s Formula import java.util.scanner; public class AreaOfTriangle float a,b,c,p,area; Scanner sc = new Scanner(System.in); System.out.println("Enter the value of 1st side of triangle."); a = sc.nextfloat(); System.out.println("Enter the value of 2nd side of triangle."); b = sc.nextfloat(); System.out.println("Enter the value of 3rd side of triangle."); c = sc.nextfloat(); p = (a+b+c)/2; area = (float) Math.sqrt(p*(p-a)*(p-b)*(p-c)); System.out.println("Area of Triangle is: "+ area);

4 //Java Program to Find Greater of Four Numbers without using Nested if import java.util.scanner; public class GreaterOfFourNumber int a,b,c,d; Scanner sc = new Scanner(System.in); System.out.println("Enter 1st Number: "); a = sc.nextint(); System.out.println("Enter 2nd Number: "); b = sc.nextint(); System.out.println("Enter 3rd Number: "); c = sc.nextint(); System.out.println("Enter 4th Number: "); d = sc.nextint(); int max = greater(a, greater(b, greater(c,d))); System.out.println("Max of all four numbers is: "+max); public static int greater(int a, int b) if(a>b) return a; return b;

5 //Java Program to Swap two numbers using bitwise operator import java.util.scanner; public class BitwiseSwap Scanner sc = new Scanner(System.in); int a, b; System.out.println("Enter first number: "); a = sc.nextint(); System.out.println("Enter second number: "); b = sc.nextint(); System.out.println("Before Swapping: a = "+a+" and b = "+b); a = a^b; b = b^a; a = a^b; System.out.println("After Swapping: a = "+a+" and b = "+b);

6 //Java Program to Add two binary numbers and display the sum import java.util.scanner; public class AddBinaryNumbers Scanner sc = new Scanner(System.in); System.out.println("Enter first binary number(0/1 string): "); String a = sc.next(); System.out.println("Enter second binary number(0/1 string): "); String b = sc.next(); int num1 = Integer.parseInt(a, 2); int num2 = Integer.parseInt(b, 2); int sum = num1+num2; System.out.print("Sum of two numbers in binary is "); getbinary(sum); public static void getbinary(int decimalnumber) int[] binaryvalue = new int[1000]; int i = 0; while (decimalnumber > 0) binaryvalue[i] = decimalnumber % 2; decimalnumber = decimalnumber / 2; i++; for (int j = i - 1; j >= 0; j--) System.out.print(binaryValue[j]);

7 //Java Program to Multiply two binary numbers and display the result import java.util.scanner; public class MultiplyBinaryNumber Scanner sc = new Scanner(System.in); System.out.println("Enter first binary number(0/1 string): "); String a = sc.next(); System.out.println("Enter second binary number(0/1 string): "); String b = sc.next(); int num1 = Integer.parseInt(a, 2); int num2 = Integer.parseInt(b, 2); int sum = num1*num2; System.out.print("Sum of two numbers in binary is "); getbinary(sum); public static void getbinary(int decimalnumber) int[] binaryvalue = new int[1000]; int i = 0; while (decimalnumber > 0) binaryvalue[i] = decimalnumber % 2; decimalnumber = decimalnumber / 2; i++; for (int j = i - 1; j >= 0; j--) System.out.print(binaryValue[j]);

8 //Java Program to Convert Decimal Number to Binary import java.util.scanner; public class DecimalToBinary Scanner sc = new Scanner(System.in); System.out.println("Enter a decimal Number: "); int a = sc.nextint(); System.out.print("Binary Conversion of Number is: "); getbinary(a); public static void getbinary(int decimalnumber) int[] binaryvalue = new int[1000]; int i = 0; while (decimalnumber > 0) binaryvalue[i] = decimalnumber % 2; decimalnumber = decimalnumber / 2; i++; for (int j = i - 1; j >= 0; j--) System.out.print(binaryValue[j]);

9 //Java Program to find the information about the installed java version public class InstalledJavaInfo System.out.println("Java Version of System: "+System.getProperty("java.version")); System.out.println("Java Runtime Version of System: "+System.getProperty("java.runtime.version")); System.out.println("Java Home Variable: "+System.getProperty("java.home")); System.out.println("Java Vendor: "+System.getProperty("java.vendor")); System.out.println("Java Vendor URL: "+System.getProperty("java.vendor.url")); System.out.println("Java Class Path: "+System.getProperty("java.class.path")+"\n");

10 //Java Program to print the current date and time details. import java.sql.timestamp; public class DateTimeDetails Timestamp currenttimedetails = new Timestamp(System.currentTimeMillis()); System.out.println("Current Time Details: "+ currenttimedetails);

11 //Java Problems to Print Odd Numbers till 100 public class JavaOddNumbers for(int i = 1; i<= 100; i++) if(i%2!= 0) System.out.println(i);

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