自己做网站制作教程最近一周新闻热点回顾
java.nio.IntBuffer类的duplicate()方法用于创建一个新的IntBuffer，它在所有方面都相同地共享给定缓冲区的内容。
用法:
public abstract IntBuffer duplicate()
返回值：此方法返回新的IntBuffer，它携带以前的IntBuffer的内容
下面是说明duplicate()方法的示例：
范例1：使用直接IntBuffer
// Java program to demonstrate duplicate() method
import java.nio.*;
import java.util.*;
public class GFG {
public static void main(String[] args)
{
// Declaring the capacity of the IntBuffer
int capacity = 10;
// Creating the IntBuffer
try {
// creating object of Intbuffer
// and allocating size capacity
IntBuffer ib1 = IntBuffer.allocate(capacity);
// putting the value in Intbuffer
ib1.put(8);
ib1.put(2, 9);
ib1.rewind();
// print the Original IntBuffer
System.out.println("Original IntBuffer: "
+ Arrays.toString(ib1.array()));
// Creating a duplicate copy of IntBuffer
// using duplicate() method
IntBuffer ib2 = ib1.duplicate();
// print the duplicate copy of IntBuffer
System.out.print("Duplicate IntBuffer: "
+ Arrays.toString(ib2.array()));
}
catch (IllegalArgumentException e) {
System.out.println("IllegalArgumentException catched");
}
catch (ReadOnlyBufferException e) {
System.out.println("ReadOnlyBufferException catched");
}
}
}
输出：
Original IntBuffer: [8, 0, 9, 0, 0, 0, 0, 0, 0, 0]
Duplicate IntBuffer: [8, 0, 9, 0, 0, 0, 0, 0, 0, 0]
范例2：使用read-onlyintbuffer
// Java program to demonstrate
// duplicate() method
// using read-onlyIntbuffer
import java.nio.*;
import java.util.*;
public class GFG {
public static void main(String[] args)
{
// Declaring the capacity of the IntBuffer
int capacity = 10;
// Creating the IntBuffer
try {
// creating object of Intbuffer
// and allocating size capacity
IntBuffer ib1 = IntBuffer.allocate(capacity);
// putting the value in Intbuffer
ib1.put(8);
ib1.put(2, 9);
ib1.rewind();
// print the Original IntBuffer
System.out.println("Original IntBuffer: "
+ Arrays.toString(ib1.array()));
// Creating a read-only copy of IntBuffer
// using asReadOnlyBuffer() method
IntBuffer readonly = ib1.asReadOnlyBuffer();
// print the read-only copy of IntBuffer
System.out.print("read-only IntBuffer: ");
while (Readonly.hasRemaining())
System.out.print(readonly.get() + ", ");
System.out.println("");
// Rewinding the readonly IntBuffer
readonly.rewind();
// Creating a duplicate copy of IntBuffer
// using duplicate() method
IntBuffer ib2 = readonly.duplicate();
// print the duplicate copy of IntBuffer
System.out.print("Duplicate copy of read-only IntBuffer: ");
while (ib2.hasRemaining())
System.out.print(ib2.get() + ", ");
System.out.println("");
}
catch (IllegalArgumentException e) {
System.out.println("IllegalArgumentException catched");
}
catch (ReadOnlyBufferException e) {
System.out.println("ReadOnlyBufferException catched");
}
}
}
输出：
Original IntBuffer: [8, 0, 9, 0, 0, 0, 0, 0, 0, 0]
Read-only IntBuffer: 8, 0, 9, 0, 0, 0, 0, 0, 0, 0,
Duplicate copy of read-only IntBuffer: 8, 0, 9, 0, 0, 0, 0, 0, 0, 0,