Java中的 ShortBuffer compareTo 方法及示例
Java.nio.ShortBuffer类的compareTo()方法用于将一个缓冲区与另一个缓冲区进行比较。
通过按字典顺序比较它们的剩余元素序列来比较两个短缓冲区，而不考虑每个序列在其相应缓冲区中的起始位置。短元素对的比较就像调用 Short.compare(short, short) 一样。短缓冲区无法与任何其他类型的对象进行比较。
语法：
public int compareTo(ShortBuffer that)参数：此方法将一个短缓冲区对象作为参数，与此缓冲区进行比较。
返回值：此方法返回负整数、零或正整数，因为此缓冲区小于、等于或大于给定缓冲区。
以下是说明compareTo()方法的示例：
程序 1 ：当两个 FloatBuffer 相等时。
// Java program to demonstrate
// compareTo() method
import java.nio.*;
import java.util.*;
public class GFG {
public static void main(String[] args)
{
// Declaring the capacity of the sb
int capacity1 = 3;
// Creating the ShortBuffer
try {
// creating object of shortbuffer sb
// and allocating size capacity
ShortBuffer sb = ShortBuffer.allocate(capacity1);
// putting the value in sb
sb.put((short)956);
sb.put((short)761);
sb.put((short)461);
// revind the short buffer
sb.rewind();
// print the ShortBuffer
System.out.println(" ShortBuffer sb: "
+ Arrays.toString(sb.array()));
// creating object of shortbuffer sb1
// and allocating size capacity
ShortBuffer sb1 = ShortBuffer.allocate(capacity1);
// putting the value in sb1
sb1.put((short)956);
sb1.put((short)761);
sb1.put((short)461);
// revind the short buffer
sb1.rewind();
// print the shortBuffer
System.out.println(" ShortBuffer sb1: "
+ Arrays.toString(sb1.array()));
// compare both buffer and store the value into integer
int i = sb.compareTo(sb1);
// if else condition
if (i == 0)
System.out.println("\nboth buffer are lexicographically equal ");
else if (i >= 0)
System.out.println("\nfb is lexicographically greater than fb1 ");
else
System.out.println("\nfb is lexicographically less than fb1 ");
}
catch (IllegalArgumentException e) {
System.out.println(" Exception throws: "
+ e);
}
catch (ReadOnlyBufferException e) {
System.out.println(" Exception throws: "
+ e);
}
}
}
输出：
ShortBuffer sb: [956, 761, 461]
ShortBuffer sb1: [956, 761, 461]
both buffer are lexicographically equal
方案二：当这个 ShortBuffer 大于传递的 ShortBuffer
// Java program to demonstrate
// compareTo() method
import java.nio.*;
import java.util.*;
public class GFG {
public static void main(String[] args)
{
// Declaring the capacity of the sb
int capacity1 = 3;
// Creating the ShortBuffer
try {
// creating object of shortbuffer sb
// and allocating size capacity
ShortBuffer sb = ShortBuffer.allocate(capacity1);
// putting the value in sb
sb.put((short)956);
sb.put((short)761);
sb.put((short)41);
// revind the short buffer
sb.rewind();
// print the ShortBuffer
System.out.println(" ShortBuffer s: "
+ Arrays.toString(sb.array()));
// creating object of shortbuffer sb1
// and allocating size capacity
ShortBuffer sb1 = ShortBuffer.allocate(capacity1);
// putting the value in sb1
sb1.put((short)856);
sb1.put((short)761);
sb1.put((short)461);
// revind the short buffer
sb1.rewind();
// print the ShortBuffer
System.out.println(" ShortBuffer sb1: "
+ Arrays.toString(sb1.array()));
// compare both buffer and store the value into integer
int i = sb.compareTo(sb1);
// if else condition
if (i == 0)
System.out.println("\nboth buffer are lexicographically equal ");
else if (i >= 0)
System.out.println("\nfb is lexicographically greater than fb1 ");
else
System.out.println("\nfb is lexicographically less than fb1 ");
}
catch (IllegalArgumentException e) {
System.out.println(" Exception throws: "
+ e);
}
catch (ReadOnlyBufferException e) {
System.out.println(" Exception throws: "
+ e);
}
}
}
输出：
ShortBuffer s: [956, 761, 41]
ShortBuffer sb1: [856, 761, 461]
fb is lexicographically greater than fb1
Program 3 : 当这个 ShortBuffer 小于传递的 ShortBuffer
// Java program to demonstrate
// compareTo() method
import java.nio.*;
import java.util.*;
public class GFG {
public static void main(String[] args)
{
// Declaring the capacity of the sb
int capacity1 = 3;
// Creating the ShortBuffer
try {
// creating object of shortbuffer sb
// and allocating size capacity
ShortBuffer sb = ShortBuffer.allocate(capacity1);
// putting the value in sb
sb.put((short)856);
sb.put((short)761);
sb.put((short)461);
// revind the short buffer
sb.rewind();
// print the ShortBuffer
System.out.println(" ShortBuffer sb: "
+ Arrays.toString(sb.array()));
// creating object of shortbuffer sb1
// and allocating size capacity
ShortBuffer sb1 = ShortBuffer.allocate(capacity1);
// putting the value in sb1
sb1.put((short)956);
sb1.put((short)761);
sb1.put((short)461);
// revind the short buffer
sb1.rewind();
// print the ShortBuffer
System.out.println(" ShortBuffer sb1: "
+ Arrays.toString(sb1.array()));
// compare both buffer and store the value into integer
int i = sb.compareTo(sb1);
// if else condition
if (i == 0)
System.out.println("\nboth buffer are lexicographically equal ");
else if (i >= 0)
System.out.println("\nfb is lexicographically greater than fb1 ");
else
System.out.println("\nfb is lexicographically less than fb1 ");
}
catch (IllegalArgumentException e) {
System.out.println(" Exception throws: "
+ e);
}
catch (ReadOnlyBufferException e) {
System.out.println(" Exception throws: "
+ e);
}
}
}
输出：
ShortBuffer sb: [856, 761, 461]
ShortBuffer sb1: [956, 761, 461]
fb is lexicographically less than fb1