java Pinterest needsInput()函数在 Java 中的示例

Pinterest needsInput()函数在 Java 中的示例

原文:https://www . geesforgeks . org/pincher-needsinput-function-in-Java-with-examples/

在 java.util.zip 中平减器类的 needsInput() 功能用于检查输入数据缓冲区是否为空。如果输入数据缓冲区为空，则调用设置输入()函数来提供输入

功能签名:

public boolean needsInput()

语法:

d.needsInput();

参数:函数不需要参数

返回类型:该函数返回一个布尔值，即如果输入缓冲区为空则返回真，否则返回假。

异常:函数不抛出任何异常

例 1:

// 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
    {
        // 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];

        // does the deflater need input
        System.out.println("Input Buffer Empty ? :"
                           + d.needsInput());

        // 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());

        // does the deflater need input
        System.out.println("Input Buffer Empty ? :"
                           + d.needsInput());

        // end
        d.end();
    }
}

输出:

Input Buffer Empty ? :false
Compressed String :x?sOM?.N?/r???q??
 Size 21
Original String :GeeksforGeeksGeeksforGeeksGeeksforGeeksGeeksforGeeks
 Size 52
Input Buffer Empty ? :true