手动写java OOM内存溢出 java.lang.OutOfMemoryError: Java heap space

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1,先设置运作内存大小。我用的是idea

2,最大最小内存各设置为5M  -Xms5m -Xmx5m

3

package com.hcmony.test.memory;

import java.util.ArrayList;
import java.util.List;
import java.util.UUID;

/**
 * <h3>Shenjue.java基本描述</h3>
 * <p>
 *     java.lang.OutOfMemoryError:Javaheapspace:这种是java堆内存不够,
 *     一个原因是真不够(如递归的层数太多等),
 *     另一个原因是程序中有死循环;
 *     如果是java堆内存不够的话,可以通过调整JVM下面的配置来解决:
 *     -Xms3062m
 *     -Xmx3062m
 * </p>
 *
 * @author hcmony
 * @since V1.0.0, 2018/09/04 14:44
 */
public class HeapSpaceMemory {

	public static void main(String[] args) {
		List<byte[]> list = new ArrayList<>();
		int i=0;
		while(true){
			list.add(new byte[5*1024*1024]);
			System.out.println("分配次数:"+(++i));
		}
	}
}

4,运行结果

Connected to the target VM, address: '127.0.0.1:51870', transport: 'socket'
Exception in thread "main" java.lang.OutOfMemoryError: Java heap space
	at com.hcmony.test.memory.HeapSpaceMemory.main(HeapSpaceMemory.java:20)
Disconnected from the target VM, address: '127.0.0.1:51870', transport: 'socket'

Process finished with exit code 1

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转载自blog.csdn.net/hcmony/article/details/82383739