java 如何将字符串String类型转换成整数long,代码如下: long l = Long.parseLong([String]); 或 long l = Long.parseLong([String],[int radix]); long l = Long.valueOf("123").longValue();
我补充一个算了 long l = new Long("1234");
3楼是对的public Long(String s) throws NumberFormatException Constructs a newly allocated Long object that represents the long value indicated by the String parameter. The string is converted to a long value in exactly the manner used by the parseLong method for radix 10. Parameters: s - the String to be converted to a Long. Throws: NumberFormatException - if the String does not contain a parsable long. See Also: parseLong(java.lang.String, int)
查API LONG
这个问题应该属于基础类的吧?google搜索一下就行啦
long a= new Long("123"); 是对了 可以这用写 也可以 long a= new Long("123").longValue();
new BigDecimal("123456").longValue();
long l=Long.parseLong("yangchoa")
int i = String.ValueOf(str); long l = (long)i;
3楼, long l=new Long("123"); 编译都过不了呀!!你用的jdk是哪个版本?
long l = Long.parseLong("123456");
to 12楼: long l=new Long("123"); 是JDK1.5开始支持的 1.4之前的无法编译
long aa = (long)(Double.parseDouble("123456"));
public class Test { /** * @param args */ public static void main(String[] args) { // TODO Auto-generated method stub Long a = new Long("0335"); System.out.println(a); } }已通过测试!
long l = Long.parseLong([String]); 或 long l = Long.parseLong([String],[int radix]); long l = Long.valueOf("123").longValue();
long l = new Long("1234");
throws NumberFormatException
Constructs a newly allocated Long object that represents the long value indicated by the String parameter. The string is converted to a long value in exactly the manner used by the parseLong method for radix 10. Parameters:
s - the String to be converted to a Long.
Throws:
NumberFormatException - if the String does not contain a parsable long.
See Also:
parseLong(java.lang.String, int)
LONG
是对了 可以这用写
也可以
long a= new Long("123").longValue();
long l = (long)i;
long l=new Long("123");
编译都过不了呀!!你用的jdk是哪个版本?
long l=new Long("123"); 是JDK1.5开始支持的
1.4之前的无法编译
* @param args
*/
public static void main(String[] args) {
// TODO Auto-generated method stub
Long a = new Long("0335");
System.out.println(a);
}
}已通过测试!