Revert "订正 (#274)"

This reverts commit 7671ebf.

Author: hcsp-bot

src/main/java/com/github/hcsp/datatype/Cast.java

@@ -4,50 +4,48 @@ public class Cast {
     // Cast an int to byte
     // 将int类型转换成byte
     public static byte int2byte(int i) {
-        return (byte) i;
+        return i;
     }
 
     // Cast an int to short
     // 将int类型转换成short
     public static short int2short(int i) {
-        return (short) i;
+        return i;
     }
 
     // Cast an int to char
     // 将int类型转换成char
     public static char int2char(int i) {
-        return (char) i;
+        return i;
     }
 
     // Cast an int to String, e.g. 123 -> "123"
     // 将一个整数转换为字符串，例如，将123转换成字符串"123"
     public static String int2String(int i) {
-        return String.valueOf(i);
+        return i;
     }
 
     // Cast an String to int, e.g. "123" -> 123
     // 将一个字符串转换成整数，例如，将字符串"123"转换成整数123
     public static int string2int(String s) {
-        return Integer.parseInt(s);
+        return s;
     }
 
     // Cast an String to double, e.g. "1.23" -> 1.23
     // 将一个字符串转换成double类型，例如，将字符串"1.23"转换成1.23
     public static double string2double(String s) {
-        return Double.parseDouble(s);
+        return s;
     }
 
     // Cast an Long to int
     // 将Long类型转换成int
     public static int Long2int(Long l) {
-        long z = l;
-        return (int) z;
+        return l;
     }
 
     // Cast an Double to long
     // 将Double类型转换成long
     public static long double2Long(Double d) {
-        double m = d;
-        return (long) m;
+        return d;
     }
 }