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📜  Java中的 FieldPosition equals() 方法及示例

📅  最后修改于: 2022-05-13 01:54:38.705000             🧑  作者: Mango

Java中的 FieldPosition equals() 方法及示例

Java.text.FieldPosition类的equals()方法用于检查两个 FieldPosition 对象是否相同。

句法:

public boolean equals(Object obj)

参数:此方法采用FieldPosition对象,该对象将与当前 FieldPosition 对象进行比较。
返回值:如果两个FieldPosition 对象彼此相等,则返回 true,否则返回 false。
以下是说明equals()方法的示例:
示例 1:

Java
// Java program to demonstrate
// equals() method
 
import java.text.*;
import java.util.*;
import java.io.*;
 
public class GFG {
    public static void main(String[] argv)
    {
        try {
 
            // Creating and initializing
            // new FieldPosition Object
            FieldPosition pos_1
                = new FieldPosition(
                    DateFormat.Field.AM_PM);
 
            // Creating and initializing
            // new FieldPosition Object
            FieldPosition pos_2
                = new FieldPosition(
                    DateFormat.Field.AM_PM);
 
            // compare both object
            // using equals() method
            boolean i = pos_1.equals(pos_2);
 
            // display result
            if (i)
                System.out.println(
                    "pos_1 is equals to pos_2");
            else
                System.out.println(
                    "pos_1 is not equal to pos_2");
        }
 
        catch (ClassCastException e) {
 
            System.out.println("Exception thrown : " + e);
        }
    }
}


Java
// Java program to demonstrate
// equals() method
 
import java.text.*;
import java.util.*;
import java.io.*;
 
public class GFG {
    public static void main(String[] argv)
    {
        try {
 
            // Creating and initializing
            // new FieldPosition Object
            FieldPosition pos_1
                = new FieldPosition(
                    DateFormat.Field.AM_PM);
 
            // Creating and initializing
            // new FieldPosition Object
            FieldPosition pos_2
                = new FieldPosition(
                    MessageFormat.Field.ARGUMENT);
 
            // compare both object
            // using equals() method
            boolean i = pos_1.equals(pos_2);
 
            // display result
            if (i)
                System.out.println(
                    "pos_1 is equals to pos_2");
            else
                System.out.println(
                    "pos_1 is not equal to pos_2");
        }
 
        catch (ClassCastException e) {
 
            System.out.println("Exception thrown : " + e);
        }
    }
}


输出:
pos_1 is equals to pos_2

示例 2:

Java

// Java program to demonstrate
// equals() method
 
import java.text.*;
import java.util.*;
import java.io.*;
 
public class GFG {
    public static void main(String[] argv)
    {
        try {
 
            // Creating and initializing
            // new FieldPosition Object
            FieldPosition pos_1
                = new FieldPosition(
                    DateFormat.Field.AM_PM);
 
            // Creating and initializing
            // new FieldPosition Object
            FieldPosition pos_2
                = new FieldPosition(
                    MessageFormat.Field.ARGUMENT);
 
            // compare both object
            // using equals() method
            boolean i = pos_1.equals(pos_2);
 
            // display result
            if (i)
                System.out.println(
                    "pos_1 is equals to pos_2");
            else
                System.out.println(
                    "pos_1 is not equal to pos_2");
        }
 
        catch (ClassCastException e) {
 
            System.out.println("Exception thrown : " + e);
        }
    }
}
输出:
pos_1 is not equal to pos_2

参考: https://docs.oracle.com/javase/9/docs/api/ Java/text/FieldPosition.html#equals-java.lang.Object-