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-