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slgobinathslgobinath
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Lambda expressions
1 parent 484ea5b commit e1828ac

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‎lambdaexpression/LambdaExercise.java‎

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import java.util.*;
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public class LambdaExercise {
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public static void main(String[] args) {
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String[] array = {"Java", "C++", "Ruby", "Python"};
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System.out.println("Unsorted: " + Arrays.toString(array));
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Arrays.sort(array, (x, y) -> y.compareTo(x));
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System.out.println("Reverse sorted: " + Arrays.toString(array));
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}
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}

‎lambdaexpression/LambdaRuleFive.java‎

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public class LambdaRuleFive {
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public static void main(String[] args) {
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Printable printable = (x, y) -> System.out.println(x + " : " + y);
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doStuff(printable);
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}
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private static void doStuff(Printable printer) {
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printer.print("Hello", 5);
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}
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}
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interface Printable {
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public void print(String msg, int count);
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}

‎lambdaexpression/LambdaRuleFour.java‎

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public class LambdaRuleFour {
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public static void main(String[] args) {
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Printable printable = x -> {System.out.println(x);};
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doStuff(printable);
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}
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private static void doStuff(Printable printer) {
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printer.print("Hello");
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}
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}
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interface Printable {
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public void print(String msg);
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}

‎lambdaexpression/LambdaRuleOne.java‎

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public class LambdaRuleOne {
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public static void main(String[] args) {
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Printable printable = (String x, int y) -> {
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for(int i = 1; i <= y; i++) {
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System.out.println(x);
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}
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};
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doStuff(printable);
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}
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private static void doStuff(Printable printer) {
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printer.print("Hello", 5);
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}
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}
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interface Printable {
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public void print(String msg, int count);
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}

‎lambdaexpression/LambdaRuleSix.java‎

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public class LambdaRuleSix {
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public static void main(String[] args) {
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TaxCalculator calculator = x -> x * 0.02;
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doStuff(calculator);
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}
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private static void doStuff(TaxCalculator calc) {
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double tax = calc.calculate(100.00);
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System.out.println("TAX: " + tax);
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}
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}
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interface TaxCalculator {
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public double calculate(double amount);
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}

‎lambdaexpression/LambdaRuleThree.java‎

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public class LambdaRuleThree {
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public static void main(String[] args) {
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Printable printable = () -> {System.out.println("Hello world");};
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doStuff(printable);
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}
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private static void doStuff(Printable printer) {
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printer.print();
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}
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}
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interface Printable {
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public void print();
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}

‎lambdaexpression/LambdaRuleTwo.java‎

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public class LambdaRuleTwo {
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public static void main(String[] args) {
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Printable printable = (x, y) -> {
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for(int i = 1; i <= y; i++) {
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System.out.println(x);
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}
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};
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doStuff(printable);
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}
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private static void doStuff(Printable printer) {
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printer.print("Hello", 5);
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}
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}
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interface Printable {
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public void print(String msg, int count);
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}

‎lambdaexpression/LambdaThreadDemo.java‎

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public class LambdaThreadDemo {
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public static void main(String[] args) {
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// Runnable anonymous object
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Runnable runnable = () -> System.out.println("ID: " + Thread.currentThread().getId());
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Thread thread = new Thread(runnable);
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thread.start();
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}
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}

‎lambdaexpression/LambdaVariableScope.java‎

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public class LambdaVariableScope {
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public static void main(String[] args) {
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String name = "Java Helps";
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Thread validLambda = new Thread(() -> System.out.println(name));
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/*Thread invalidLambda = new Thread(() -> {
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name = "Something else"; // Cannot change the value
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System.out.println(name);
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});*/
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validLambda.start();
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}
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}

‎lambdaexpression/ThreadDemo.java‎

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public class ThreadDemo {
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public static void main(String[] args) {
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// Runnable anonymous object
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Runnable runnable = new Runnable() {
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@Override
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public void run() {
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System.out.println("ID: " + Thread.currentThread().getId());
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}
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};
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Thread thread = new Thread(runnable);
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thread.start();
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}
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}

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