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writeInt() method is available in java.io package.
writeInt()方法在java.io包中可用。
writeInt() method is used to write the given integer value to the basic DataOutputStream as 4 bytes (i.e. 32 bit) and the variable counter is plus by 4 on successful execution.
writeInt()方法用于将给定的整数值作为4个字节(即32位)写入基本DataOutputStream,并且成功执行时变量计数器加4。
writeInt() method is a non-static method, it is accessible with the class object only and if we try to access the method with the class name then we will get an error.
writeInt()方法是一个非静态方法,只能通过类对象访问,如果尝试使用类名称访问该方法,则会收到错误消息。
writeInt() method may throw an exception at the time of writing an integer.
writeInt()方法在写入整数时可能会引发异常。
IOException: This exception may throw while getting any input/output error.
IOException :在获取任何输入/输出错误时,可能引发此异常。
Syntax:
句法:
public final void writeInt(int val);
Parameter(s):
参数:
int val – represents the integer value to be written to the data output stream.
int val –表示要写入数据输出流的整数值。
Return value:
返回值:
The return type of the method is void, it returns nothing.
该方法的返回类型为void ,不返回任何内容。
Example:
例:
// Java program to demonstrate the example // of void writeInt(int val) method // of DataOutputStreamimport java.io.*;public class WriteIntOfDOS { public static void main(String[] args) throws Exception { InputStream is_stm = null; DataInputStream dis_stm = null; FileOutputStream fos_stm = null; DataOutputStream dos_stm = null; int[] in = { 10, 20, 30, 40, 50 }; try { // Instantiate FileInputStream, // DataInputStream, FileOutputStream // and DataOutputStream fos_stm = new FileOutputStream("C:\\Users\\Preeti Jain\\Desktop\\programs\\includehelp.txt"); dos_stm = new DataOutputStream(fos_stm); is_stm = new FileInputStream("C:\\Users\\Preeti Jain\\Desktop\\programs\\includehelp.txt"); dis_stm = new DataInputStream(is_stm); for (int val: in ) { // By using writeInt() method isto // write int value to the // DataOutputStream dos_stm dos_stm.writeInt(val); } // By using flush() method isto // flush the bytes to the basic // output stream dos_stm.flush(); // Loop To Read Available Data till end while (dis_stm.available() > 0) { // By using readInt() method isto read // int from dis_stm int val = dis_stm.readInt(); System.out.println("dos_stm.writeInt(val): " + val); } } catch (Exception ex) { System.out.println(ex.toString()); } finally { // To free system resources linked // with these streams if (is_stm != null) is_stm.close(); if (dis_stm != null) dis_stm.close(); if (dos_stm != null) dos_stm.close(); if (fos_stm != null) fos_stm.close(); } }}
Output
输出量
dos_stm.writeInt(val): 10dos_stm.writeInt(val): 20dos_stm.writeInt(val): 30dos_stm.writeInt(val): 40dos_stm.writeInt(val): 50
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