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Commitdb9382d

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feat: add leetcode-1 solution.
1 parentd197a23 commitdb9382d

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3 files changed

+52
-23
lines changed

3 files changed

+52
-23
lines changed
Lines changed: 6 additions & 9 deletions
Original file line numberDiff line numberDiff line change
@@ -1,5 +1,8 @@
11
packagecom.yeahqing.easy._0001;
22

3+
importcom.yeahqing.structure.Interval;
4+
importcom.yeahqing.util.IOUtil;
5+
36
importjava.util.*;
47

58
/**
@@ -15,21 +18,15 @@ public int[] twoSum(int[] nums, int target) {
1518
returnnewint[]{i,map.get(nums[i])};
1619
}
1720
// 找target-nums[i]是否存在
18-
map.put(target-nums[i],i);
21+
map.put(target -nums[i],i);
1922
}
2023
returnnewint[]{};
2124
}
2225

2326
publicstaticvoidmain(String[]args) {
2427
Solutionsolution =newSolution();
25-
Scannerscan =newScanner(System.in);
26-
String[]arr =scan.nextLine().split(",");
27-
int[]nums =newint[arr.length];
28-
for (inti =0;i <nums.length;i++) {
29-
nums[i] =Integer.parseInt(arr[i]);
30-
}
31-
inttarget =scan.nextInt();
28+
inttarget =9;
29+
int[]nums =Interval.createTestData("[2,7,11,15]");
3230
System.out.println(Arrays.toString(solution.twoSum(nums,target)));
33-
scan.close();
3431
}
3532
}
Lines changed: 25 additions & 14 deletions
Original file line numberDiff line numberDiff line change
@@ -1,6 +1,7 @@
11
packagecom.yeahqing.structure;
22

33
importjava.util.ArrayList;
4+
importjava.util.Iterator;
45
importjava.util.List;
56

67
/**
@@ -21,31 +22,41 @@ public Interval(int s, int e) {
2122
end =e;
2223
}
2324

24-
publicstaticList<Interval>createTestData(Stringdata) {
25-
List<Interval>list =newArrayList<>();
26-
String[]d =data.substring(1,data.length() -1).split("],\\[");
25+
/***
26+
* 输入一维字符串数组，返回整型数组
27+
* @param data "[1, 2, 3, 4]"
28+
* @return int[]
29+
*/
30+
publicstaticint[]createTestData(Stringdata) {
31+
List<Integer>list =newArrayList<>();
32+
String[]d =data.substring(1,data.length() -1).split(",");
2733
for (Strings :d) {
28-
String[]sub =s.split(",");
2934
// parseInt返回int, valueOf返回Integer
30-
list.add(newInterval(Integer.parseInt(sub[0]),Integer.parseInt(sub[1])));
35+
list.add(Integer.valueOf(s));
3136
}
32-
returnlist;
37+
int[]nums =newint[list.toArray().length];
38+
for (inti =0;i <nums.length;i++) {
39+
nums[i] = (int)list.toArray()[i];
40+
}
41+
returnnums;
3342
}
3443

35-
publicstaticvoidprint(List<Interval>list) {
44+
publicstaticvoidprint(List<Integer>list) {
3645
if (list ==null) {
3746
System.out.println("null");
3847
return;
3948
}
4049
StringBuildersb =newStringBuilder();
41-
for (Intervalinterval :list) {
42-
sb.append("[")
43-
.append(interval.start)
44-
.append(",")
45-
.append(interval.end)
46-
.append("],");
50+
Iterator<Integer>iterator =list.stream().iterator();
51+
if (iterator.hasNext()) {
52+
sb.append("[").append(iterator.next());
53+
}
54+
while (iterator.hasNext()) {
55+
Integerval =iterator.next();
56+
sb.append(",").append(val);
4757
}
48-
System.out.println(sb.substring(0,sb.length() -1));
58+
sb.append("]");
59+
System.out.println(sb);
4960
}
5061

5162
}

‎src/com/yeahqing/util/IOUtil.java‎

Lines changed: 21 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -0,0 +1,21 @@
1+
packagecom.yeahqing.util;
2+
3+
importcom.sun.xml.internal.ws.policy.privateutil.PolicyUtils;
4+
5+
importjava.util.Scanner;
6+
7+
/**
8+
* @author YeahQing
9+
* @date 2022/9/28
10+
*/
11+
publicclassIOUtil {
12+
publicstaticint[]readNums() {
13+
Scannerscan =newScanner(System.in);
14+
String[]arr =scan.nextLine().split(",");
15+
int[]nums =newint[arr.length];
16+
for (inti =0;i <nums.length;i++) {
17+
nums[i] =Integer.parseInt(arr[i]);
18+
}
19+
returnnums;
20+
}
21+
}

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