JUC學習，CountDownLatch（執行緒減法計數器） 執行緒 和 Enum（列舉）
package com.zhangye;
import java.util.concurrent.CountDownLatch;
public class CountDownLatchTest {
public static void main(String[] args) throws Exception{
CountDownLatch countdown = new CountDownLatch(6);
for (int i = 1; i <= 6; i++) {
new Thread(()->{
System.out.println(Thread.currentThread().getName()+" \t 國被滅");
countdown.countDown();
},CountryEnum.forEachEnum(i).getMessage()).start();
}
countdown.await();
System.out.println(Thread.currentThread().getName()+"\t 秦國統一華夏：");
}
}
列印結果
齊 國被滅
燕 國被滅
楚 國被滅
趙 國被滅
韓 國被滅
魏 國被滅
main 秦國統一華夏：
package com.zhangye;
public enum CountryEnum {
ONE(1,"齊"),
TWO(2,"燕"),
THREE(3,"楚"),
FOUR(4,"趙"),
FIVE(5,"韓"),
SIX(6,"魏");
private Integer code;
private String message;
public Integer getCode() {
return code;
}
public void setCode(Integer code) {
this.code = code;
}
public String getMessage() {
return message;
}
public void setMessage(String message) {
this.message = message;
}
private CountryEnum(Integer code, String message) {
this.code = code;
this.message = message;
}
public static CountryEnum forEachEnum(int code){
CountryEnum[] arr = CountryEnum.values();
for (CountryEnum countryEnum : arr) {
if(countryEnum.getCode() == code){
return countryEnum;
}
}
return null;
}
}
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