我已经为我的计划问题实现了一个解决方案分割器。但是当我现在运行优化器时,它返回以下错误:
Exception in thread "main" java.lang.IllegalStateException: The partition child thread with partIndex (1) has thrown an exception. Relayed here in the parent thread.
at org.optaplanner.core.impl.partitionedsearch.queue.PartitionQueue$Partition
我有一个用于多线程的静态HashMap<UUID, MyObject> ALL = new HashMap<>(); .
为了再现错误,我编写了以下代码:
HashMap<Integer, String> list = new HashMap<>();
list.put(1, "str 1");
list.put(2, "str 2");
new Thread(() -> {
while(true) {
ArrayList<String> val;
sy
最近,我开始学习Java,我有一个关于IO流和线程的问题。在我们的语言中,这两个定义都像"Поток“一样翻译,这让我感到困惑。
我想知道这两个主题的总体概念:流和线程。我将提供一个例子,说明我对这一主题的看法。
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
public class Test {
public static void main(String[] args) {
try{
FileO
下面的函数接受bash命令,执行它,并返回应答。
public static String cmd(String s) {
String out = "";
try {
Process pr = PB.command("bash","-c",s).start(); // PB is Process Builder
BufferedReader buf = new BufferedReader(new InputStreamReader(pr.getInputS
为什么StandardPBEByteEncryptor要锁定一个对象? "pool-2-thread-115" - Thread t@169
java.lang.Thread.State: BLOCKED
at org.jasypt.encryption.pbe.StandardPBEByteEncryptor.decrypt(StandardPBEByteEncryptor.java:1035)
- waiting to lock <55a2b29b> (a javax.crypto.Cipher) owned by
我正在学习Java线程的入门教程。代码非常简单
public interface Runnable {
void run();
}
public class RunnableThread implements Runnable {
Thread runner;
public RunnableThread() {
}
public RunnableThread(String threadName) {
runner = new Thread(this, threadName); // (1) Create a new thread.
我的android应用程序在自动重新启动之前一直在崩溃。当日志猫崩溃时(在我按Run之后),
02-17 13:26:59.550: E/AndroidRuntime(1072): FATAL EXCEPTION: main
02-17 13:26:59.550: E/AndroidRuntime(1072): java.lang.RuntimeException: Unable to instantiate application android.app.Application: java.lang.IllegalStateException: Unable to get p