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Add Solution.java to problems 1290

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solution/1290.Convert Binary Number in a Linked List to Integer
- Solution.java
- Solution2.java

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`@@ -0,0 +1,22 @@`
	`1`	`+/**`
	`2`	`+ * Definition for singly-linked list.`
	`3`	`+ * public class ListNode {`
	`4`	`+ * int val;`
	`5`	`+ * ListNode next;`
	`6`	`+ * ListNode(int x) { val = x; }`
	`7`	`+ * }`
	`8`	`+ */`
	`9`	`+class Solution {`
	`10`	`+ public int getDecimalValue(ListNode head) {`
	`11`	`+ int sum = 0;`
	`12`	`+ StringBuilder sb = new StringBuilder("0");`
	`13`	`+ while (head != null) {`
	`14`	`+ sum += head.val;`
	`15`	`+ if (sum != 0) {`
	`16`	`+ sb.append(head.val);`
	`17`	`+ }`
	`18`	`+ head = head.next;`
	`19`	`+ }`
	`20`	`+ return Integer.valueOf(sb.toString(), 2);`
	`21`	`+ }`
	`22`	`+}`

Lines changed: 20 additions & 0 deletions

Original file line number	Diff line number	Diff line change
`@@ -0,0 +1,20 @@`
	`1`	`+/**`
	`2`	`+ * Definition for singly-linked list.`
	`3`	`+ * public class ListNode {`
	`4`	`+ * int val;`
	`5`	`+ * ListNode next;`
	`6`	`+ * ListNode(int x) { val = x; }`
	`7`	`+ * }`
	`8`	`+ */`
	`9`	`+class Solution {`
	`10`	`+ public int getDecimalValue(ListNode head) {`
	`11`	`+ int count = 0;`
	`12`	`+ if (head != null) {`
	`13`	`+ while(head != null){`
	`14`	`+ count = (count << 1) + head.val;`
	`15`	`+ head = head.next;`
	`16`	`+ }`
	`17`	`+ }`
	`18`	`+ return count;`
	`19`	`+ }`
	`20`	`+}`

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