Java 中的整数短值()方法
原文:https://www . geesforgeks . org/integer-short value-method-in-Java/
Integer.shortValue()是 java.lang 的一个内置方法，它以 short 类型返回该整数的值。
语法:
public short shortValue()
参数:该方法不取任何参数。
返回值:方法将该对象转换为 short 类型后，返回该对象表示的整数值。
下面的程序说明了 Integer.shortValue()方法: 程序 1: 为正整数。
// Java program that demonstrates
// Integer.shortValue() method
import java.lang.*;
public class Geeks {
public static void main(String[] args)
{
Integer sh_object = new Integer(763);
// It will return the value of this Integer as a short type
short sh_value = sh_object.shortValue();
System.out.println(" The Value of sh_value = " + sh_value);
}
}
Output:
The Value of sh_value = 763
程序 2: 为负数。
// Java program that demonstrates
// Integer.shortValue() method
import java.lang.*;
public class Geeks {
public static void main(String[] args)
{
Integer sh_object = new Integer(-43);
// It will return the value of this Integer as a short type
short sh_value = sh_object.shortValue();
System.out.println(" The Value of sh_value = " + sh_value);
}
}
Output:
The Value of sh_value = -43
程序 3: 为十进制值和字符串。 注意:当十进制值和字符串作为参数传递时，它会返回一条错误消息。
// java program that demonstrates
// Integer.shortValue() method
import java.lang.*;
public class Geeks {
public static void main(String[] args)
{
// passing a decimal value
Integer sh_object = new Integer(27.51);
short sh_value = sh_object.shortValue();
System.out.println(" The Value of sh_value = " + sh_value);
// passing a string
Integer sh_object2 = new Integer("51");
short sh_value2 = sh_object2.shortValue();
System.out.println(" The Value of sh_value2 = " + sh_value2);
}
}
输出:
prog.java:10: error: no suitable constructor found for Integer(double)
Integer sh_object = new Integer(27.51);
^
constructor Integer.Integer(int) is not applicable
(argument mismatch; possible lossy conversion from double to int)
constructor Integer.Integer(String) is not applicable
(argument mismatch; double cannot be converted to String)
1 error
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