如果已到达压缩数据输出流的末尾,则java.util.zip中Deflater类的finished()函数将返回true。
函数签名:
public boolean finished()
用法:
d.finished();
参数:该函数不需要参数
返回类型:该函数返回布尔值,即如果所有输入都已压缩并存储在给定的缓冲区中,则为true,否则为false。
异常:该函数不会引发任何异常
范例1:演示使用finished()函数
// Java program to demonstrate
// the use of finished() function
import java.util.zip.*;
import java.io.UnsupportedEncodingException;
class GFG {
public static void main(String args[])
throws UnsupportedEncodingException
{
// deflater
Deflater d = new Deflater();
// get the text
String pattern = "GeeksforGeeks", text = "";
// generate the text
for (int i = 0; i < 4; i++)
text += pattern;
// set the input for deflator
d.setInput(text.getBytes("UTF-8"));
// finish
d.finish();
// output of finished function
System.out.println("end of compressed data "
+ "output stream reached:"
+ d.finished());
// output bytes
byte output[] = new byte[1024];
// compress the data
int size = d.deflate(output);
// compressed String
System.out.println("Compressed String:"
+ new String(output)
+ "\n Size " + size);
// original String
System.out.println("Original String:" + text
+ "\n Size " + text.length());
// output of finished function
System.out.println("end of compressed data "
+ "output stream reached:"
+ d.finished());
// end
d.end();
}
}
输出:
end of compressed data output stream reached:false Compressed String:x?sOM?.N?/r???q?? Size 21 Original String:GeeksforGeeksGeeksforGeeksGeeksforGeeksGeeksforGeeks Size 52 end of compressed data output stream reached:true
参考: https://docs.oracle.com/javase/7/docs/api/java/util/zip/Deflater.html#finished()
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注:本文由纯净天空筛选整理自andrew1234大神的英文原创作品 Deflater finished() function in Java with examples。非经特殊声明,原始代码版权归原作者所有,本译文未经允许或授权,请勿转载或复制。