Java Inflater needsInput()用法及代码示例

如果输入数据缓冲区为空，Inflater类的needsInput()函数返回true，否则返回false，如果输入数据缓冲区为空，则调用setInput()函数以提供输入

函数签名：

public boolean needsInput()

用法:

i.needsInput();

参数：该函数不需要参数

返回类型：该函数返回布尔值，即，如果输入缓冲区为空，则返回true，否则返回false。

异常：该函数不会引发任何异常

范例1：使用needsInput()函数

// Java program to describe the use 
// of needsInput() function 
  
import java.util.zip.*; 
import java.io.UnsupportedEncodingException; 
  
class GFG { 
    public static void main(String args[]) 
        throws UnsupportedEncodingException, 
               DataFormatException 
    { 
  
        // compress the data 
  
        // 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 bytes 
        byte output[] = new byte[1024]; 
  
        // compress the data 
        int size = d.deflate(output); 
  
        // end 
        d.end(); 
  
        // end of compression 
  
        // use Inflater to get back the original data 
  
        // Inflater 
        Inflater i = new Inflater(); 
  
        // does the Inflater need input 
        System.out.println("Input Buffer Empty ?:"
                           + i.needsInput()); 
  
        // set the input for inflator 
        i.setInput(output); 
  
        // output bytes 
        byte inflater_output[] = new byte[1024]; 
  
        // uncompress the data 
        int org_size = i.inflate(inflater_output); 
  
        // output of inflater and deflater 
        System.out.println("Compressed output of deflater:"
                           + new String(output)); 
        System.out.println("Compressed output of Inflater:"
                           + new String(inflater_output, "UTF-8")); 
  
        // does the Inflater need input 
        System.out.println("Input Buffer Empty ?:"
                           + i.needsInput()); 
  
        // end 
        i.end(); 
    } 
}

输出：

参考： https://docs.oracle.com/javase/7/docs/api/java/util/zip/Inflater.html#needsInput()

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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 Inflater needsInput() 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。