ObjectInputStream 类的 readInt() 方法用于读取 32 位 int。
用法
Public int readInt() throws IOException
参数
没有传递参数。
返回
读取的 32 位整数。
抛出
EOFException - 如果到达文件末尾。
IOException - 如果发生其他 I/O 错误。
例子1
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
public class ObjectInputStreamreadIntExample1 {
public static void main(String[] args) throws IOException {
int[] buf = {1 , 2 , 6 , 6 , 7 , 3};
try {
// create file output stream
FileOutputStream fileoutstream = new FileOutputStream("file1.txt");
// create data output stream
DataOutputStream dataoutstream = new DataOutputStream(fileoutstream);
// for each byte in the buffer
for (int b:buf) {
// write character to the dos
dataoutstream.writeInt(b);
}
// force bytes to the underlying stream
dataoutstream.flush();
// create file input stream
InputStream inpstream = new FileInputStream("file1.txt");
// create new data input stream
DataInputStream datainpstream = new DataInputStream(inpstream);
// read till end of the stream
while(datainpstream.available()>0) {
// read character
int c = datainpstream.readInt();
// print
System.out.print(" "+c);
}
} catch(Exception e) {
e.printStackTrace();
}
}
}
输出:
1 2 6 6 7 3
例子2
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
public class ObjectInputStreamreadIntExample2 {
public static void main(String[] args) throws IOException {
int[] carray = {21 , 22 , 23 , 45 , 67 , 66};
int barray[];
try {
// create file output stream
FileOutputStream fileoutstream = new FileOutputStream("barray");
// create data output stream
DataOutputStream dataoutstream = new DataOutputStream(fileoutstream);
// for each byte in the buffer
for (int b:carray) {
// write character to the dos
dataoutstream.writeInt(b);
}
// force bytes to the underlying stream
dataoutstream.flush();
// create file input stream
InputStream inpstream = new FileInputStream("barray");
// create new data input stream
DataInputStream datainpstream = new DataInputStream(inpstream);
// read till end of the stream
for(int i=0;i<=carray.length;i++){
// read double values in float format
int c = datainpstream.readInt();
// print
System.out.print(" "+c);
}
} catch(Exception e) {
}
}
}
输出:
21 22 23 45 67 66
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