学步园

直接上代码：

package org.bruce.file.handle.experiment;

/**
 * @author Bruce Yang
 * 测试 java heap 允许使用的最大内存
 */
public class File2ByteArray {
	public static void main(String[] args) throws Exception {
		testHeapMax();
	}
	
	public static void testHeapMax() {
		int KB = 1024;
		int MB = KB * 1024;
		byte[] bytes = null;
		for(int i = 0; i < 100; ++ i) {
			System.out.println(i);
			bytes = new byte[MB *  i];
		}
	}
}

控制台输出为：

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Exception in thread "main" java.lang.OutOfMemoryError: Java heap space
	at org.bruce.file.handle.experiment.File2ByteArray.testHeapMax(File2ByteArray.java:22)
	at org.bruce.file.handle.experiment.File2ByteArray.main(File2ByteArray.java:11)