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详解java中多线程异常捕获runnable的实现
1、背景：
java 多线程异常不向主线程抛，自己处理，外部捕获不了异常。所以要实现主线程对子线程异常的捕获。
2、工具：
实现runnable接口的layerinittask类，threadexception类，线程安全的vector
3、思路：
向layerinittask中传入vector，记录异常情况，外部遍历，判断，抛出异常。
4、代码：
package step5.exception;
import java.util.vector;
import java.util.concurrent.executorservice;
import java.util.concurrent.executors;
import java.util.concurrent.timeunit;
import com.autonavi.pds.core.incre.impl.layerinittask;
public class threadexception {
public static void main(string[] args) {
try {
vector<string> errret = new vector();
executorservice pool = executors.newfixedthreadpool(6);
for (int i = 0; i < 6; ++i) {
pool.execute(new layerinittask(i, errret));
}
pool.shutdown();
pool.awaittermination(1, timeunit.days);
if (errret.size() > 0) {
system.out.println("根据返回值捕获：exception");
throw new runtimeexception( "入库失败！");
}
} catch (exception e) {
system.out.println("根据抛出异常捕获：exception");
throw new runtimeexception( "入库失败！");
}
system.out.println("-----入库成功，发成功完成工作邮件--------");
}
}
package step5.exception;
import java.util.vector;
public class layerinittask implements runnable {
private int threadnum;
private vector<string> errret;
public layerinittask(int num, vector<string> errret) {
this.threadnum = num;
this.errret = errret;
}
@override
public void run() {
try {
if (this.threadnum == 3) {
throw new runtimeexception( this.threadnum + ":数据格式有误.");
}
system.out.println(this.threadnum + ":刷表成功");
} catch (exception e) {
this.errret.add("线程:" + this.threadnum + "运行异常！");
throw new runtimeexception( this.threadnum + ":刷表失败");
}
}
}
5、结果：
exception in thread "pool-1-thread-4" java.lang.runtimeexception: 3:刷表失败
at step5.exception.layerinittask.run(layerinittask.java:23)
at java.util.concurrent.threadpoolexecutor.runworker(unknown source)
at java.util.concurrent.threadpoolexecutor$worker.run(unknown source)
at java.lang.thread.run(unknown source)
exception in thread "main" java.lang.runtimeexception: 入库失败！
at step5.exception.threadexception.main(threadexception.java:27)
2:刷表成功
1:刷表成功
5:刷表成功
0:刷表成功
4:刷表成功
根据返回值捕获：exception
根据抛出异常捕获：exception
以上就是java实现多线程异常捕获runnable的案例的详细内容。