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smartherdsmartherd
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Java Tutorial for Beginners
1 parent a2488cf commit 3fd4438

24 files changed

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lines changed

‎src/10_TernaryOperator.java‎

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/**
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*
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* Ternary Operator
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* */
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public class Main {
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public static void main(String[] args) {
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int a = 2;
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int b = 3;
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int min = (a < b)? a : b;
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System.out.println(min);
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}
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}

‎src/11_SwitchCase.java‎

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/**
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*
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* Switch Case Statements
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* */
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public class Main {
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public static void main(String[] args) {
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char grade = 'B';
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switch (grade) {
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case 'A':
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System.out.println("Excellent. Grade A.");
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break;
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case 'B':
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System.out.println("Well Done. Grade B.");
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break;
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case 'C':
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System.out.println("You Passed. Grade C");
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break;
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case 'F':
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System.out.println("Failed, Grade F");
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break;
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default:
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System.out.println("Invalid Grade Entered");
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}
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}
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}

‎src/12_FORLoop.java‎

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/**
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*
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* FOR Loop
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* */
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public class Main {
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public static void main(String[] args) {
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for (int i = 0; i <= 20; i++) {
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if (i % 2 == 0) {
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System.out.println(i);
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}
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}
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System.out.println();
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for (int i = 20; i >= 0; i--) {
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if (i % 2 == 0) {
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System.out.println(i);
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}
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}
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}
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}

‎src/13_WhileLoop.java‎

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/**
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*
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* While Loop
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* */
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public class Main {
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public static void main(String[] args) {
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int i = 0;
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while (i <= 20) {
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if (i % 2 == 0) {
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System.out.println(i);
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}
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i++;
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}
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System.out.println();
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int j = 20;
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while (j >= 0) {
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if (j % 2 == 0) {
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System.out.println(j);
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}
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j--;
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}
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}
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}

‎src/14_DoWhileLoop.java‎

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/**
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*
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* Do-While Loop
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* */
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public class Main {
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public static void main(String[] args) {
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int i = 0;
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do {
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if (i % 2 == 0) {
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System.out.println(i);
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}
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i++;
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} while (i <= 20);
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System.out.println();
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int j = 20;
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do {
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if (j % 2 == 0) {
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System.out.println(j);
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}
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j--;
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} while (j >= 0);
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}
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}

‎src/15_BreakKeyword.java‎

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/**
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*
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* Break Statement and Labelled FOR Loop
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* */
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public class Main {
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public static void main(String[] args) {
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outer: for (int i = 1; i <= 3; i++) {
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for (int j = 1; j <= 3; j++) {
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if (i == 2 && j == 2) {
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break outer;
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}
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System.out.println(i + " " + j);
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}
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}
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}
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}

‎src/16_ContinueKeyword.java‎

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/**
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*
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* Continue Statement and Labelled FOR Loop
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* */
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public class Main {
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public static void main(String[] args) {
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outer: for (int i = 1; i <= 3; i++) {
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for (int j = 1; j <= 3; j++) {
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if (i == 2 && j == 2) {
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continue outer;
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}
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System.out.println(i + " " + j);
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}
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}
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}
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}

‎src/17_Arrays.java‎

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/**
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*
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* Arrays
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* */
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public class Main {
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public static void main(String[] args) {
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int[] firstSet = {2, 4, 7, 5, 11};
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int[] secondSet = new int[5];
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secondSet[0] = 2;
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secondSet[1] = 4;
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secondSet[2] = 7;
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secondSet[3] = 5;
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secondSet[4] = 11;
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for (int i = 0; i < firstSet.length; i++) {
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System.out.println(firstSet[i]);
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}
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System.out.println();
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for (int number: secondSet) {
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System.out.println(number);
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}
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}
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}

‎src/18_MultiDimensionalArray.java‎

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/**
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*
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* 2D Array and Jagged Array
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* */
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public class Main {
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public static void main(String[] args) {
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int[][] myArray = {
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{2, 45, 6, 32},
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{4, 65, 34},
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{7, 8, 12, 5}
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};
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for (int r = 0; r < myArray.length; r++) {
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for (int c = 0; c < myArray[r].length; c++) {
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System.out.print(myArray[r][c] + " ");
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}
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System.out.println();
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}
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// WAP to find sum
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int sum = 0;
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for (int[] aMyArray: myArray) {
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for (int anMyArray: aMyArray) {
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sum = sum + anMyArray;
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}
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}
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System.out.println("Sum is: " + sum);
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}
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}

‎src/19_Functions.java‎

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/**
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*
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* Methods or Functions
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* */
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public class Main {
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public static void main(String[] args) {
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// WAP to find if a number is even or odd
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String result1 = isEven(4);
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String result2 = isEven(5);
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System.out.println(result1);
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System.out.println(result2);
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}
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private static String isEven(int num) {
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String str;
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if (num % 2 == 0)
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str = num + " is Even";
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else
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str = num +" is odd";
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return str;
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}
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}

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