Java 中的 IntBuffer limit()方法,带示例
原文:https://www . geesforgeks . org/int buffer-limit-method-in-Java-with-examples/
java.nio.IntBuffer 类的 limit() 方法用于修改该 IntBuffer 的限制。此方法将待设置的限制作为参数,并将其设置为此缓冲区的新限制。如果此缓冲区的标记已经定义,并且大于新的指定限制,则不会设置和丢弃此新限制。
语法:
public final IntBuffer limit(int newLimit)
参数:该方法取整数型的一个参数新极限,该参数是指要设置为缓冲区新极限的极限。
返回值:该方法将指定的新限制设置为该缓冲区的新限制后,返回该缓冲区。
以下是举例说明 limit()方法的示例:
示例 1:
// Java program to demonstrate
// limit() method
import java.nio.*;
import java.util.*;
public class GFG {
public static void main(String[] args)
{
// defining and allocating IntBuffer
// using allocate() method
IntBuffer intBuffer
= IntBuffer.allocate(4);
// put int value in IntBuffer
// using put() method
intBuffer.put(20);
intBuffer.put(30);
// print the int buffer
System.out.println(
"IntBuffer before "
+ "setting buffer's limit: "
+ Arrays.toString(
intBuffer.array())
+ "\nPosition: "
+ intBuffer.position()
+ "\nLimit: "
+ intBuffer.limit());
// Limit the intBuffer
// using limit() method
intBuffer.limit(1);
// print the int buffer
System.out.println(
"\nintBuffer after "
+ "setting buffer's limit: "
+ Arrays.toString(
intBuffer.array())
+ "\nPosition: "
+ intBuffer.position()
+ "\nLimit: "
+ intBuffer.limit());
}
}
输出:
IntBuffer before setting buffer's limit: [20, 30, 0, 0]
Position: 2
Limit: 4
intBuffer after setting buffer's limit: [20, 30, 0, 0]
Position: 1
Limit: 1
示例 2:
// Java program to demonstrate
// limit() method
import java.nio.*;
import java.util.*;
public class GFG {
public static void main(String[] args)
{
// defining and allocating IntBuffer
// using allocate() method
IntBuffer intBuffer
= IntBuffer.allocate(5);
// put int value in IntBuffer
// using put() method
intBuffer.put(20);
intBuffer.put(30);
intBuffer.put(40);
// mark will be going to
// discarded by limit()
intBuffer.mark();
// print the int buffer
System.out.println(
"intBuffer before "
+ "setting buffer's limit: "
+ Arrays.toString(
intBuffer.array())
+ "\nPosition: "
+ intBuffer.position()
+ "\nLimit: "
+ intBuffer.limit());
// Limit the intBuffer
// using limit() method
intBuffer.limit(4);
// print the int buffer
System.out.println(
"\nintBuffer before "
+ "setting buffer's limit: "
+ Arrays.toString(
intBuffer.array())
+ "\nPosition: "
+ intBuffer.position()
+ "\nLimit: "
+ intBuffer.limit());
}
}
输出:
intBuffer before setting buffer's limit: [20, 30, 40, 0, 0]
Position: 3
Limit: 5
intBuffer before setting buffer's limit: [20, 30, 40, 0, 0]
Position: 3
Limit: 4
参考:https://docs . Oracle . com/javase/9/docs/API/Java/nio/int buffer . html # limit-int-
版权属于:月萌API www.moonapi.com,转载请注明出处