Java 中的 ByteBuffer toString()方法，带示例
原文:https://www . geeksforgeeks . org/bytebuffer-tostring-method-in-Java-with-examples/
字节缓冲类的 toString() 方法是用于返回表示字节缓冲对象包含的数据的字符串的内置方法。创建并初始化一个新的字符串对象，从这个字节缓冲对象中获取字符序列，然后由 toString()返回字符串。对象包含的对该序列的后续更改不会影响字符串的内容。 语法:
public abstract String toString()
返回值:这个方法返回字符串，代表 ByteBuffer 对象包含的数据。 下面的程序说明了 ByteBuffer.toString()方法: 示例 1:
Java 语言(一种计算机语言，尤用于创建网站)
// Java program to demonstrate
// toString() method
import java.nio.*;
import java.util.*;
public class GFG {
public static void main(String[] args)
{
// Declaring the capacity of the ByteBuffer
int capacity = 5;
// creating object of ByteBuffer
// and allocating size capacity
ByteBuffer bb1 = ByteBuffer.allocate(capacity);
// putting the value in ByteBuffer
bb1.put((byte)10);
bb1.put((byte)20);
// print the ByteBuffer
System.out.println("Original ByteBuffer: "
+ Arrays.toString(bb1.array()));
// Creating a shared subsequence buffer of given ByteBuffer
// using toString() method
String value = bb1.toString();
// print the ByteBuffer
System.out.println("\nstring representation of ByteBuffer: "
+ value);
}
}
Output:
Original ByteBuffer: [10, 20, 0, 0, 0]
string representation of ByteBuffer: java.nio.HeapByteBuffer[pos=2 lim=5 cap=5]
例 2:
Java 语言(一种计算机语言，尤用于创建网站)
// Java program to demonstrate
// toString() method
import java.nio.*;
import java.util.*;
public class GFG {
public static void main(String[] args)
{
// Declaring the capacity of the ByteBuffer
int capacity = 4;
// creating object of ByteBuffer
// and allocating size capacity
ByteBuffer bb1 = ByteBuffer.allocate(capacity);
// putting the value in ByteBuffer
bb1.put((byte)10)
.put((byte)20)
.put((byte)30)
.put((byte)40);
// print the ByteBuffer
System.out.println("Original ByteBuffer: "
+ Arrays.toString(bb1.array()));
// Creating a shared subsequence buffer of given ByteBuffer
// using toString() method
String value = bb1.toString();
// print the ByteBuffer
System.out.println("\nstring representation of ByteBuffer: "
+ value);
}
}
Output:
Original ByteBuffer: [10, 20, 30, 40]
string representation of ByteBuffer: java.nio.HeapByteBuffer[pos=4 lim=4 cap=4]
参考:T2【https://docs . Oracle . com/javase/9/docs/API/Java/nio/bytebuffer . html # toString–T4】
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