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vogellavogella
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Some updates on the map and list example, forgot exactly what I did
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10 files changed

+121
-15
lines changed

10 files changed

+121
-15
lines changed

‎com.vogella.java.collections.list/.classpath‎

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<?xml version="1.0" encoding="UTF-8"?>
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<classpath>
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<classpathentry kind="src" path="src"/>
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<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/JavaSE-1.7"/>
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<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/JavaSE-1.8"/>
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<classpathentry kind="output" path="bin"/>
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</classpath>

‎com.vogella.java.collections.list/.settings/org.eclipse.jdt.core.prefs‎

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eclipse.preferences.version=1
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org.eclipse.jdt.core.compiler.codegen.inlineJsrBytecode=enabled
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org.eclipse.jdt.core.compiler.codegen.targetPlatform=1.7
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org.eclipse.jdt.core.compiler.codegen.targetPlatform=1.8
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org.eclipse.jdt.core.compiler.codegen.unusedLocal=preserve
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org.eclipse.jdt.core.compiler.compliance=1.7
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org.eclipse.jdt.core.compiler.compliance=1.8
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org.eclipse.jdt.core.compiler.debug.lineNumber=generate
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org.eclipse.jdt.core.compiler.debug.localVariable=generate
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org.eclipse.jdt.core.compiler.debug.sourceFile=generate
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org.eclipse.jdt.core.compiler.problem.assertIdentifier=error
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org.eclipse.jdt.core.compiler.problem.enumIdentifier=error
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org.eclipse.jdt.core.compiler.source=1.7
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org.eclipse.jdt.core.compiler.source=1.8

‎com.vogella.java.collections.list/src/com/vogella/java/collections/list/ListExample.java‎

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public class ListExample {
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public static void main(String[] args) {
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List<Integer> list = new ArrayList<Integer>();
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List<Integer> list = new ArrayList<>();
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list.add(3);
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list.add(2);
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list.add(1);

‎com.vogella.java.collections.list/src/com/vogella/java/collections/list/ListSorter.java‎

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package com.vogella.java.collections.list;
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import java.util.ArrayList;
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import java.util.List;
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public class ListSorter {
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public static void main(String[] args) {
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System.out.println("Sorting with natural order");
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List<String> l1 = createList();
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l1.sort(null);
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l1.forEach(System.out::println);
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System.out.println("Sorting with a lamba expression for the comparison");
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List<String> l2 = createList();
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l2.sort((s1, s2) -> s1.compareToIgnoreCase(s2)); // sort ignoring case
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l2.forEach(System.out::println);
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System.out.println("Sorting with a method references");
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List<String> l3 = createList();
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l3.sort(String::compareToIgnoreCase);
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l3.forEach(System.out::println);
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}
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private static List<String> createList() {
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List<String> list = new ArrayList<>();
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list.add("iPhone");
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list.add("Ubuntu");
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list.add("Android");
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list.add("Mac OS X");
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return list;
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}
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}

‎com.vogella.java.collections.list/src/com/vogella/java/collections/list/RemoveIfList.java‎

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package com.vogella.java.collections.list;
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import java.util.ArrayList;
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import java.util.List;
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public class RemoveIfList {
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public static void main(String[] args) {
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System.out.println("Demonstration of removeIf");
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List<String> l1 = createList();
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// remove all items which contains an "x"
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l1.removeIf(s-> s.toLowerCase().contains("x"));
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l1.forEach(s->System.out.println(s));
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}
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private static List<String> createList() {
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List<String> list = new ArrayList<>();
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list.add("iPhone");
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list.add("Ubuntu");
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list.add("Android");
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list.add("Mac OS X");
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return list;
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}
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}

‎com.vogella.java.collections.map/.classpath‎

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<?xml version="1.0" encoding="UTF-8"?>
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<classpath>
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<classpathentry kind="src" path="src"/>
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<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/JavaSE-1.7"/>
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<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/JavaSE-1.8"/>
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<classpathentry kind="output" path="bin"/>
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</classpath>

‎com.vogella.java.collections.map/.settings/org.eclipse.jdt.core.prefs‎

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eclipse.preferences.version=1
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org.eclipse.jdt.core.compiler.codegen.inlineJsrBytecode=enabled
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org.eclipse.jdt.core.compiler.codegen.targetPlatform=1.7
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org.eclipse.jdt.core.compiler.codegen.targetPlatform=1.8
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org.eclipse.jdt.core.compiler.codegen.unusedLocal=preserve
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org.eclipse.jdt.core.compiler.compliance=1.7
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org.eclipse.jdt.core.compiler.compliance=1.8
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org.eclipse.jdt.core.compiler.debug.lineNumber=generate
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org.eclipse.jdt.core.compiler.debug.localVariable=generate
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org.eclipse.jdt.core.compiler.debug.sourceFile=generate
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org.eclipse.jdt.core.compiler.problem.assertIdentifier=error
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org.eclipse.jdt.core.compiler.problem.enumIdentifier=error
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org.eclipse.jdt.core.compiler.source=1.7
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org.eclipse.jdt.core.compiler.source=1.8

‎com.vogella.java.collections.map/src/com/vogella/java/collections/map/ComputeIfAbsent.java‎

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package com.vogella.java.collections.map;
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import java.util.HashMap;
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import java.util.Map;
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public class ComputeIfAbsent {
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public static void main(String[] args) {
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Map<String,Integer> map = createMap();
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Integer calculatedVaue = map.computeIfAbsent("Java", it -> 0);
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System.out.println(calculatedVaue);
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// write to command line
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map.keySet().forEach(
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key -> System.out.println(key + " " + map.get(key)));
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}
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private static Map<String, Integer> createMap() {
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Map<String, Integer> map = new HashMap<>();
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map.put("Eclipse IDE", 0);
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map.put("Eclipse RCP", 0);
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map.put("Git", 0);
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map.put("Groovy", 0);
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return map;
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}
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}

‎com.vogella.java.collections.map/src/com/vogella/java/collections/map/MapOrDefault.java‎

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package com.vogella.java.collections.map;
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import java.util.HashMap;
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import java.util.Map;
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public class MapOrDefault {
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public static void main(String[] args) {
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Map<String,Integer> map = createMap();
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map.put("Android", 1 + map.getOrDefault("Android", 0));
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// write to command line
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map.forEach((k, v) -> System.out.printf("%s %s%n", k, v));
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}
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private static Map<String, Integer> createMap() {
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Map<String, Integer> map = new HashMap<>();
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map.put("Eclipse IDE", 0);
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map.put("Eclipse RCP", 0);
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map.put("Git", 0);
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return map;
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}
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}

‎com.vogella.java.collections.map/src/com/vogella/java/collections/map/MapTester.java‎

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Original file line numberDiff line numberDiff line change
@@ -12,18 +12,14 @@ public static void main(String[] args) {
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fillData(map);
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// write to command line
15-
for (String key : map.keySet()) {
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System.out.println(key + " " + map.get(key));
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}
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map.forEach((k, v) -> System.out.printf("%s %s%n", k, v));
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// add and remove from the map
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map.put("iPhone", "Created by Apple");
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map.remove("Android");
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// write again to command line
24-
for (String key : map.keySet()) {
25-
System.out.println(key + " " + map.get(key));
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}
22+
map.forEach((k, v) -> System.out.printf("%s %s%n", k, v));
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}
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