Lambda Expressions
There are some instructions within the code.
Bring this class into your Eclipse workspace and then follow through with the instructions inside the main method.
Try your best to get the class to work!
package com.mcnz.lambdas; import java.util.ArrayList; import java.util.Arrays; import java.util.Comparator; import java.util.HashMap; import java.util.List; import java.util.Map; public class Examples { public static void main(String args[]) { Map<String, Integer> jobs = new HashMap<>(); jobs.put("Jr Developer", 40000); jobs.put("Sr Developer", 30000); jobs.put("Architect", 50000); /********* A S S I G N M E N T *********/ //Replace the following line of code //using a pre-Java-8 syntax jobs.forEach((k,v)->System.out.println("Job : " + k + " Salary : " + v)); /********* A S S I G N M E N T *********/ //Using iterative loops, implement the logic performed //by the following lambda functions using a pre-Java-8 syntax jobs.computeIfAbsent("Jr Programmer", s -> s.length()*10000); jobs.computeIfPresent("Architect", (k,v) -> k.length()*10000); jobs.computeIfPresent("Sr Programmer",(k,v) -> k.length()*10000); jobs.replaceAll((job, salary)->new Integer(salary.toString().replaceAll("0", "5"))); jobs.forEach((k,v)->System.out.println("Job : " + k + " Salary : " + v)); String[] toys = {"games", "TRUCKS", "dolls", "Consoles","bikes","abc"}; /********* A S S I G N M E N T *********/ // Use a lambda expression to replace the inner class Arrays.sort(toys, new Comparator() { @Override public int compare(String a, String b) { return a.length()-b.length(); } }); List gifts = Arrays.asList(toys); /********* A S S I G N M E N T *********/ //instead of the code below, //pass a UnaryOperator function //to the replaceAll method for (int i=0;i<gifts.size();i++) { gifts.set(i, gifts.get(i).toLowerCase()); } /********* A S S I G N M E N T *********/ // replace the code below // by passing a Consumer function // to the ArrayList's forEach method for (String gift : gifts) { System.out.println(gift); } ArrayList games = new ArrayList (); games.add("Fortnite"); games.add("Clue"); games.add("Operation"); /********* A S S I G N M E N T *********/ //Use the forEach method to print out //the value of each element in the games array for (String game : games) { System.out.println(game); } /********* A S S I G N M E N T *********/ // Replace the following by passing // a predicate function to the // removeIf method for (int i = 0; i < games.size(); i++) { if (games.get(i).length()<5) { games.remove(i); } } } } </pre>