java732的简单介绍

本文目录一览：

1、java编写一个方法找出一个数组里所有数组元素的排列例：输入{7,2,3} 返回{723,732,327,372,237,273}
2、tomcat启动时报的错误
3、我的世界打开程序时报错。
4、Tomcat 启动，报如下错误？

java编写一个方法找出一个数组里所有数组元素的排列例：输入{7,2,3} 返回{723,732,327,372,237,273}

import java.util.Arrays;

/**

* 获得数组全排列的一个实现算法

public class Test {

static String[] array = { “7”, “2”, “3” };

public static void main(String[] args) {

getAllOrder(0, array.length – 1);

}

public static void getAllOrder(int begin, int end) {

if (begin == end) {

check();

} else {

for (int i = begin; i = end; i++) {

// 交换数据

swap(begin, i);

getAllOrder(begin + 1, end);

swap(i, begin);

}

public static void swap(int from, int to) {

// 这里应该加上各种防止无效交换的情况

// 比如位置相同，或者2个位置的数据相同

if (from == to) {

return;

}

String tmp = array[from];

array[from] = array[to];

array[to] = tmp;

}

public static void check() {

// 排列拿到了，可以进行你的判断了。

System.out.println(Arrays.toString(array));

}

记得采纳！

tomcat启动时报的错误

你把apache-tomcat-6.0.37\conf\Catalina\localhost下的文件，除了host-manager.xml和manager.xml之外的全部删了试试

我的世界打开程序时报错。

这是游戏文本化，是你的设置不对。打开游戏还没开始的界面。打开设置最大内存旁边有个最佳内存点一下就可以玩了，如果照样不能玩没关系输入比最佳内存小一倍的数字就行了

Tomcat 启动，报如下错误？

这个问题有很多原因，我遇到的一个场景如下，先给解决办法，再分析

解决办法：

仔细检查会发现，会发现有这个一个错误提示：

Multiple markers at this line

– The type org.apache.commons.pool2.impl.GenericObjectPoolConfig cannot be resolved. It is indirectly referenced from

required .class files

这个提示是包冲突，看到这个会想到maven依赖有冲突，注释掉多余的依赖问题则解决了（springboot 有个数据访问的项目集成了commons.pool，我的是是pom中多加了一个commons.pool 的依赖）。

问题描述：

ContainerBase.addChild: start:

org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Catalina].StandardHost[localhost].StandardContext[/datas-pre]]

at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:162)

at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:753)

at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:729)

at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:717)

at org.apache.catalina.startup.HostConfig.deployDescriptor(HostConfig.java:621)

at org.apache.catalina.startup.HostConfig$DeployDescriptor.run(HostConfig.java:1835)

at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source)

at java.util.concurrent.FutureTask.run(Unknown Source)

at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)

at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)

at java.lang.Thread.run(Unknown Source)

Caused by: org.apache.catalina.LifecycleException: Failed to start component [org.apache.catalina.webresources.StandardRoot@5abfde6e]

at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:162)

at org.apache.catalina.core.StandardContext.resourcesStart(StandardContext.java:4969)

at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5102)

at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:145)

… 10 more

Caused by: org.apache.catalina.LifecycleException: Failed to initialize component [org.apache.catalina.webresources.JarResourceSet@4b64f19e]

at org.apache.catalina.util.LifecycleBase.init(LifecycleBase.java:107)

at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:135)

at org.apache.catalina.webresources.StandardRoot.startInternal(StandardRoot.java:722)

at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:145)

… 13 more

Caused by: java.lang.IllegalArgumentException: java.util.zip.ZipException: invalid LOC header (bad signature)

at org.apache.catalina.webresources.AbstractSingleArchiveResourceSet.initInternal(AbstractSingleArchiveResourceSet.java:113)

at org.apache.catalina.util.LifecycleBase.init(LifecycleBase.java:102)

… 16 more

Caused by: java.util.zip.ZipException: invalid LOC header (bad signature)

at java.util.zip.ZipFile.read(Native Method)

at java.util.zip.ZipFile.access$1400(Unknown Source)

at java.util.zip.ZipFile$ZipFileInputStream.read(Unknown Source)

at java.util.zip.ZipFile$ZipFileInflaterInputStream.fill(Unknown Source)

at java.util.zip.InflaterInputStream.read(Unknown Source)

at sun.misc.IOUtils.readFully(Unknown Source)

at java.util.jar.JarFile.getBytes(Unknown Source)

at java.util.jar.JarFile.getManifestFromReference(Unknown Source)

at java.util.jar.JarFile.getManifest(Unknown Source)

at org.apache.catalina.webresources.AbstractSingleArchiveResourceSet.initInternal(AbstractSingleArchiveResourceSet.java:111)

… 17 more

一月 10, 2018 4:55:33 下午 org.apache.catalina.startup.HostConfig deployDescriptor

严重: Error deploying configuration descriptor D:\files\workspace\.metadata\.plugins\org.eclipse.wst.server.core\tmp0\conf\Catalina\localhost\datas-pre.xml

java.lang.IllegalStateException: ContainerBase.addChild: start: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Catalina].StandardHost[localhost].StandardContext[/datas-pre]]

at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:757)