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401ST-012401ST-012
401ST-012
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ch04
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‎ch04/.classpath‎

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<?xml version="1.0" encoding="UTF-8"?>
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<classpath>
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<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/JavaSE-10">
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<attributes>
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<attribute name="module" value="true"/>
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</attributes>
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</classpathentry>
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<classpathentry kind="src" path="src"/>
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<classpathentry kind="output" path="bin"/>
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</classpath>

‎ch04/.gitignore‎

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/bin/

‎ch04/.project‎

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<?xml version="1.0" encoding="UTF-8"?>
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<projectDescription>
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<name>ch04</name>
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<comment></comment>
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<projects>
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</projects>
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<buildSpec>
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<buildCommand>
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<name>org.eclipse.jdt.core.javabuilder</name>
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<arguments>
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</arguments>
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</buildCommand>
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</buildSpec>
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<natures>
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<nature>org.eclipse.jdt.core.javanature</nature>
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</natures>
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</projectDescription>

‎ch04/.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=10
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org.eclipse.jdt.core.compiler.codegen.unusedLocal=preserve
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org.eclipse.jdt.core.compiler.compliance=10
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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.release=enabled
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org.eclipse.jdt.core.compiler.source=10

‎ch04/src/challenge/PrinterTest.java‎

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package challenge;
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public class PrinterTest {
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public static void main(String[] args) {
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// TODO Auto-generated method stub
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Printer printerC = new Printer();
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printerC.numOfPapers =printerC.numOfPapers + 100;
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printerC.print(70);
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System.out.println(printerC.numOfPapers);
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}
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}
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class Printer{
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int numOfPapers;
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void print(int amount) {
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}
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}
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‎ch04/src/challenge/PrinterTest2.java‎

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package challenge;
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public class PrinterTest2 {
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public static void main(String[] args) {
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// TODO Auto-generated method stub
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Printer2 printerC = new Printer2();
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// printerC.numOfPapers =printerC.numOfPapers + 100;
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printerC.print(70);
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// System.out.println(printerC.numOfPapers);
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}
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}
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class Printer2{
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private int numOfPapers;
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boolean lack;
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void print(int amount) {
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}
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public int getNumOfPapers() {
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return numOfPapers;
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}
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public Printer2(){
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numOfPapers = 0;
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}
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public Printer2(int x) {
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numOfPapers =x;
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}
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}
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‎ch04/src/example/_4_10_CircleDemo.java‎

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package example;
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public class _4_10_CircleDemo {
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public static void main(String[] args) {
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// TODO Auto-generated method stub
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_4_10_Circle myCircle = new _4_10_Circle(10.0);
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_4_10_Circle yourCircle = new _4_10_Circle(5.0);
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System.out.println("원의 개수 : " + _4_10_Circle.numOfCircles);
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System.out.println("원의 개수 : " + yourCircle.numCircles);
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}
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void print() {
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System.out.println("정적 멤버에 대한 내용입니다.");
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}
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}
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class _4_10_Circle {
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double radius;
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static int numOfCircles = 0;
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int numCircles = 0;
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public _4_10_Circle(double radius) {
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this.radius = radius;
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numOfCircles++;
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numCircles++;
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}
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}

‎ch04/src/example/_4_11_UtilDemo.java‎

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package example;
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class Util{
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static int fourTimes(int i) {
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return i * 4;
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}
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}
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public class _4_11_UtilDemo {
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public static void main(String[] args) {
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// TODO Auto-generated method stub
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System.out.println(Util.fourTimes(5));
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}
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}

‎ch04/src/example/_4_12_OneToTenDemo.java‎

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package example;
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public class _4_12_OneToTenDemo {
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static int sumOneToTen;
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static {
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int sum = 0;
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for( int i =1; i <= 10; i++)
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sum += i;
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sumOneToTen = sum;
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}
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public static void main(String[] args) {
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// TODO Auto-generated method stub
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System.out.println(sumOneToTen);
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}
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}

‎ch04/src/example/_4_1PhoneDemo.java‎

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package example;
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public class _4_1PhoneDemo {
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public static void main(String[] args) {
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Phone myPhone = new Phone();
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myPhone.model = "갤럭시 S8";
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myPhone.value = 100;
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myPhone.print();
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//new 힙 메모리에 할당
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Phone yourPhone = new Phone();
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yourPhone.model = "G6";
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yourPhone.value = 85;
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yourPhone.print();
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}
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}
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class Phone {
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String model;
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int value;
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void print() {
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// this.value "this."이 생략되어 있음
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System.out.println(value + "만원 짜리 "+ model +" 스마트폰");
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}
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}
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