不会的,RandomAccessFile对于过大文件,不会一次性全部读出,而是一次一小段。我这里读取365M的大文件,内存占用也只有51KB
//------------------------
import help.Functions;
import java.io.RandomAccessFile;
public class A {
public static void main(String[] args) {
try {
long start = Runtime.getRuntime().freeMemory();
RandomAccessFile rF = new RandomAccessFile( "D:/cxz/压缩软件/S60-SDK-200634-3.1-Cpp-f.1090b.zip ", "r ");
for (int i = 0; i < 100; i++) {
if ((i % 16) == 0)
System.out.print( "\r\n ");
System.out.print(Functions.getByteHexStr(rF.readByte()) + " ");
}
long end = Runtime.getRuntime().freeMemory();
System.out.println( "\n\nused menory: " + (start - end) / 1024 + "KB ");
rF.close();
} catch (Exception e) {
e.printStackTrace();
}
}
}
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