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🍱 add default methods example
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‎java8-default-methods/README.md‎

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# Java 8 默认方法和静态方法
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‎java8-default-methods/src/main/java/io/github/biezhi/java8/defaultmethods/BasicCalculator.java‎

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package io.github.biezhi.java8.defaultmethods;
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public class BasicCalculator implements Calculator {
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@Override
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public int add(int first, int second) {
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return first + second;
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}
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@Override
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public int subtract(int first, int second) {
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return first - second;
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}
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@Override
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public int divide(int number, int divisor) {
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if (divisor == 0) {
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throw new IllegalArgumentException("divisor can't be zero.");
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}
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return number / divisor;
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}
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@Override
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public int multiply(int first, int second) {
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return first * second;
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}
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}

‎java8-default-methods/src/main/java/io/github/biezhi/java8/defaultmethods/Calculator.java‎

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package io.github.biezhi.java8.defaultmethods;
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/**
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* 计算器接口
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*
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* @author biezhi
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* @date 2018/2/11
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*/
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public interface Calculator {
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int add(int first, int second);
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int subtract(int first, int second);
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int multiply(int first, int second);
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int divide(int number, int divisor);
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}

‎java8-default-methods/src/main/java/io/github/biezhi/java8/defaultmethods/UseCalc.java‎

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package io.github.biezhi.java8.defaultmethods;
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/**
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* @author biezhi
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* @date 2018/2/11
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*/
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public class UseCalc {
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public static void main(String[] args) {
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Calculator calculator = new BasicCalculator();
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int sum = calculator.add(1, 2);
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System.out.println(sum);
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BasicCalculator cal = new BasicCalculator();
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int difference = cal.subtract(3, 2);
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System.out.println(difference);
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}
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}

‎java8-default-methods/src/main/java/io/github/biezhi/java8/defaultmethods/conflict/A.java‎

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package io.github.biezhi.java8.defaultmethods.conflict;
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/**
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* @author biezhi
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* @date 2018/2/11
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*/
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public interface A {
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default void sayHello(){
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System.out.println("你好，我是 Java 8");
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}
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}

‎java8-default-methods/src/main/java/io/github/biezhi/java8/defaultmethods/conflict/App.java‎

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package io.github.biezhi.java8.defaultmethods.conflict;
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/**
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* @author biezhi
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* @date 2018/2/11
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*/
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public class App implements A {
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@Override
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public void sayHello(){
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System.out.println("你好，我是 APP");
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}
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public static void main(String[] args) {
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new App().sayHello();
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}
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}

‎java8-default-methods/src/main/java/io/github/biezhi/java8/defaultmethods/conflict/App2.java‎

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package io.github.biezhi.java8.defaultmethods.conflict;
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/**
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* @author biezhi
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* @date 2018/2/11
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*/
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public class App2 implements A, B, C {
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public static void main(String[] args) {
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new App2().sayHello();
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}
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}

‎java8-default-methods/src/main/java/io/github/biezhi/java8/defaultmethods/conflict/App3.java‎

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package io.github.biezhi.java8.defaultmethods.conflict;
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/**
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* @author biezhi
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* @date 2018/2/11
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*/
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public class App3 implements A, B {
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@Override
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public void sayHello() {
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System.out.println("大家好，我系古天乐。探晚懒月，里没有晚过的传奇。" +
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"点一下，晚一连，撞贝不花一份钱。机要晚过了传骑，里就系我的凶第。");
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}
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public static void main(String[] args) {
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new App3().sayHello();
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}
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}

‎java8-default-methods/src/main/java/io/github/biezhi/java8/defaultmethods/conflict/B.java‎

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package io.github.biezhi.java8.defaultmethods.conflict;
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/**
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* @author biezhi
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* @date 2018/2/11
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*/
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public interface B {
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}

‎java8-default-methods/src/main/java/io/github/biezhi/java8/defaultmethods/conflict/C.java‎

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package io.github.biezhi.java8.defaultmethods.conflict;
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/**
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* @author biezhi
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* @date 2018/2/11
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*/
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public interface C extends A {
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default void sayHello(){
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System.out.println("你好，我是 渣渣辉");
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}
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}

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