Fix boundary check bug for java 402

gavinfish · gavinfish · commit 7c1365c5e90b · 2017-06-13T10:56:44.000+08:00
diff --git a/java/_402RemoveKDigits.java b/java/_402RemoveKDigits.java
@@ -51,7 +51,7 @@ public String removeKdigits(String num, int k) {
         }
         sb.reverse();
         // remove zeros at the head
-        while (sb.length() > 0 && sb.charAt(0) == '0') {
+        while (sb.length() > 1 && sb.charAt(0) == '0') {
             sb.deleteCharAt(0);
         }
         return sb.toString();

Original file line number	Diff line number	Diff line change
`@@ -51,7 +51,7 @@ public String removeKdigits(String num, int k) {`
`51`	`51`	`}`
`52`	`52`	`sb.reverse();`
`53`	`53`	`// remove zeros at the head`
`54`		`- while (sb.length() > 0 && sb.charAt(0) == '0') {`
	`54`	`+ while (sb.length() > 1 && sb.charAt(0) == '0') {`
`55`	`55`	`sb.deleteCharAt(0);`
`56`	`56`	`}`
`57`	`57`	`return sb.toString();`