Lambda表達式 簡化線程(用一次)的使用

/*** Lambda表達式 簡化線程(用一次)的使用* @author Administrator**/ public class LambdaThread {//靜態內部類static class Test implements Runnable{@Overridepublic void run() {for(int i=0;i<20;i++) {System.out.println("一邊聽歌");}} }public static void main(String[] args) {//new Thread(new Test()).start();//局部內部類class Test2 implements Runnable{@Overridepublic void run() {for(int i=0;i<20;i++) {System.out.println("一邊聽歌");}}}//new Thread(new Test2()).start();//匿名內部類 必須借助接口或者父類new Thread(new Runnable() {@Overridepublic void run() {for(int i=0;i<20;i++) {System.out.println("一邊聽歌");} }}).start();//jdk8 簡化 lambda表達式new Thread(()-> {for(int i=0;i<20;i++) {System.out.println("一邊聽歌");}}).start();} }

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lambda推導

/*** lambda推導* @author Administrator**/ public class LambdaTest01 {static class Like2 implements ILike{//內部類@Overridepublic void lambda() {System.out.println("i like lambda2 ");}public static void main(String[] args) {ILike like=new Like();like.lambda();like=new Like2();like.lambda();class Like3 implements ILike{@Overridepublic void lambda() {System.out.println("i like lambda3 "); } }like=new Like3();like.lambda();//匿名內部類like=new ILike() {@Overridepublic void lambda() {System.out.println("i like lambda4 "); }};like.lambda();// lambdalike=()->{System.out.println("i like lambda5 ");};like.lambda();}/**lambda推導必須存在類型()-> {System.out.println("i like lambda5 ");}.lambda();*/} } interface ILike{void lambda(); } //外部類 class Like implements ILike{@Overridepublic void lambda() {System.out.println("i like lambda ");} }

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lambda推導 +參數

/*** lambda推導 +參數* @author Administrator**/ public class LambdaTest02 {public static void main(String[] args) {ILove love=(int a)->{System.out.println("i like lambda -->"+a);};love.lambda(100);//簡化love=(a) -> {System.out.println("i like lambda -->"+a);};love.lambda(50);love=a -> {System.out.println("i like lambda -->"+a);};love.lambda(5);love=a -> System.out.println("i like lambda -->"+a);love.lambda(0);} } interface ILove{void lambda(int a); } //外部類 class Love implements ILove{@Overridepublic void lambda(int a) {System.out.println("i like lambda -->"+a); } }

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lambda推導 +參數+返回值

/*** lambda推導 +參數+返回值* @author Administrator**/ public class LambdaTest03 {public static void main(String[] args) {IInterest interest=(int a,int c)->{System.out.println("i like lambda -->"+(a+c));return a+c;};interest.lambda(100, 200);interest=(a,c)->{System.out.println("i like lambda -->"+(a+c));return a+c;};interest.lambda(200, 200);interest=(a,c)->{return a+c;};interest=(a,c)->a+c;System.out.println(interest.lambda(10, 20));} } interface IInterest{int lambda(int a,int b); } //外部類 class Interest implements IInterest{@Overridepublic int lambda(int a, int c) {System.out.println("i like lambda -->"+(a+c));return a+c;} }

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lambda推導

//lambda推導 public class LambdaTest04 {public static void main(String[] args) {new Thread( () -> System.out.println("一邊學習崩潰中") ).start();new Thread(()->{for(int i=0;i<100;i++) {System.out.println("一邊學習lambda");}}).start();} }

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