RandomAccessFile類writeInt()方法
- writeInt() 方法可在
java.io
包。 - writeInt() 方法用於將整數值作為 4 個字節直接寫入文件,無需任何轉換。
- writeInt() 方法是一個非靜態方法,它隻能通過類對象訪問,如果我們嘗試使用類名訪問方法,那麽我們將得到一個錯誤。
- writeInt() 方法可能在寫入整數值時拋出異常。
IOException:此異常在執行輸入/輸出操作時可能會拋出異常。
用法:
public final void writeInt(int val);
參數:
int val
– 表示要寫入的整數值。
返回值:
這個方法的返回類型是void
,它什麽都不返回。
例:
// Java program to demonstrate the example
// of void writeInt(int val) method of
// RandomAccessFile
import java.io.*;
class RAFWriteInt {
public static void main(String[] args) throws Exception {
int in = 124587;
// Instantiate a random access file
// object with file name and permissions
RandomAccessFile ra_f = new RandomAccessFile("e:/includehelp.txt", "rw");
// By using writeInt() method is to
// write an integer value to the file
ra_f.writeInt( in );
// by using seek() method is to
// set the current file indicator
// from where read/write could
// start i.e. we set here 0 so reading
// will be done from 0 till EOF
ra_f.seek(0);
// By using readInt() method is to
// read a integer from this file
System.out.print("ra_f.readInt():" + ra_f.readInt());
// By using close() method isto
// close this stream ran_f
ra_f.close();
}
}
輸出
ra_f.readInt():124587
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注:本文由純淨天空篩選整理自Preeti Jain大神的英文原創作品 Java RandomAccessFile writeInt() Method with Example。非經特殊聲明,原始代碼版權歸原作者所有,本譯文未經允許或授權,請勿轉載或複製。