我一直试图移植一段JavaScript代码,现在,我还没有开始工作的唯一部分就是这个错误: 无法在原始类型int上调用padLz(int) 即可。最初的JavaScript代码在下面,同样是我的移植版本,其中我尚未能够突出显示的部分。
错误:
无法在基本类型int
上调用padLz(int)原始
OsGridRef.prototype.toString = function(digits) {
digits = (typeof digits == 'undefined') ? 10 : digits;
e = this.easting, n = this.northing;
if (e==NaN || n==NaN) return '??';
// get the 100km-grid indices
var e100k = Math.floor(e/100000), n100k = Math.floor(n/100000);
if (e100k<0 || e100k>6 || n100k<0 || n100k>12) return '';
// translate those into numeric equivalents of the grid letters
var l1 = (19-n100k) - (19-n100k)%5 + Math.floor((e100k+10)/5);
var l2 = (19-n100k)*5%25 + e100k%5;
// compensate for skipped 'I' and build grid letter-pairs
if (l1 > 7) l1++;
if (l2 > 7) l2++;
var letPair = String.fromCharCode(l1+'A'.charCodeAt(0), l2+'A'.charCodeAt(0));
// strip 100km-grid indices from easting & northing, and reduce precision
e = Math.floor((e%100000)/Math.pow(10,5-digits/2));
n = Math.floor((n%100000)/Math.pow(10,5-digits/2));
var gridRef = letPair + ' ' + e.padLz(digits/2) + ' ' + n.padLz(digits/2);
return gridRef;
}
// pad a number with sufficient leading zeros to make it w chars wide
Number.prototype.padLZ = function(w) {
var n = this.toString();
for (var i=0; i<w-n.length; i++) n = '0' + n;
return n;
}
移植版本
public String gridrefNumToLet(int e, int n, int digits) {
// get the 100km-grid indices
double e100k = Math.floor(e/100000), n100k = Math.floor(n/100000);
if (e100k<0 || e100k>6 || n100k<0 || n100k>12) return null;
// translate those into numeric equivalents of the grid letters
double l1 = (19-n100k) - (19-n100k)%5 + Math.floor((e100k+10)/5);
double l2 = (19-n100k)*5%25 + e100k%5;
// compensate for skipped 'I' and build grid letter-pairs
if (l1 > 7) l1++;
if (l2 > 7) l2++;
String letPair = String.valueOf(l1+"A".charAt(0))+ String.valueOf(l2+"A".charAt(0));
// strip 100km-grid indices from easting & northing, and reduce precision
e = (int) Math.floor((e%100000)/Math.pow(10,5-digits/2));
n = (int) Math.floor((n%100000)/Math.pow(10,5-digits/2));
字符串gridRef = letPair +''+ e.padLz(digits / 2)+''+ n.padLz(digits / 2);
return gridRef;
}
// pad a number with sufficient leading zeros to make it w chars wide
public String padLZ(String w) {
String n = this.toString();
for (int i=0; i< n.length(); i++) n = '0' + n;
return n;
}
答案 0 :(得分:0)
用padLz(e,digits / 2)和padLz(n,digits / 2)替换e.padLz(digits / 2)和n.padLz(digits / 2),然后实现带签名的方法:< / p>
String padLz(int val, int digits) {
...
}
答案 1 :(得分:0)
将原始int值作为参数传递给padLz
函数。
作为
String padLz(int val, int digits) {
然后考虑使用
org.apache.commons.lang3.StringUtils.leftPad("" + val, digits, '0');
或
中的变体How can I pad an integers with zeros on the left?
示例强>
private static String padLz (int val, int digits) {
return org.apache.commons.lang3.StringUtils.leftPad("" + val, digits, '0');
}
System.out.println(padLz (2, 5)); --> 00002