Update 实操演练/solutions/t003-zivon.java

实操演练/solutions/t003-zivon.java

@@ -0,0 +1,113 @@
+import java.util.*;
+public class Solution {
+
+    //start
+    public ArrayList<Integer> GetLeastNumbers_Solution(int [] input, int k) {
+        ArrayList<Integer> ret=new ArrayList<Integer>(k);
+        if(input==null || k>input.length ||k==0){
+            return ret;
+        }
+
+        TreeSet<Integer> min_k_tree=new TreeSet<>();
+
+        for(int i=0;i<input.length;i++){
+            if (min_k_tree.size()<k ){
+                min_k_tree.add(input[i]);
+            }
+            else{
+                if (input[i]<min_k_tree.last()) {//新值比min_k_tree最大值小，则替换
+                    min_k_tree.remove(min_k_tree.last());
+                    min_k_tree.add(input[i]);
+                }
+            }
+        }
+
+        Iterator it_min_k_tree=min_k_tree.iterator();
+        while(it_min_k_tree.hasNext()){
+            ret.add((Integer) it_min_k_tree.next());
+        }
+        return ret;
+    }    
+    //end
+
+
+    class Test{
+        public int k;
+        public int[] input;
+        public ArrayList<Integer> result;
+        public Test(int k,int[] input,ArrayList<Integer> result){
+            this.k = k;
+            this.input=input;
+            this.result = result;
+        }
+        public Test(){
+        }
+        public void printSelf(){
+            System.out.println("正确输出为："+result);
+            System.out.println("当前测试用例为：");
+            if(input==null){
+                System.out.println("空数组引用");
+                return;
+            }
+            if(input.length==0){
+                System.out.println("空数组");
+                return;
+            }
+            for(int i : input) {
+                System.out.print(i);
+            }
+            System.out.println(" k="+k);
+        }
+    }
+    public static void main(String args[]){
+        Solution solution = new Solution();
+        int total = 8;
+        Test[] tests = new Test[total];
+        tests[0] = solution.new Test(4,new int[]{4,5,1,6,2,7,3,8},new ArrayList<>(Arrays.asList(new Integer[]{1,2,3,4})));
+        tests[1] = solution.new Test(0,new int[]{},new ArrayList<>());
+        tests[2] = solution.new Test(0,null,new ArrayList<>());
+        tests[3] = solution.new Test(1,new int[]{1},new ArrayList<>(Arrays.asList(new Integer[]{1})));
+        tests[4] = solution.new Test(0,new int[]{4,5,1,6,2,7,3,8},new ArrayList<>());
+        tests[5] = solution.new Test(8,new int[]{4,5,1,6,2,7,3,8},new ArrayList<>(Arrays.asList(new Integer[]{4,5,1,6,2,7,3,8})));
+        tests[6] = solution.new Test(8,new int[]{11,33,4,5,1,6,99,384,27,2,7,3,8,10},new ArrayList<>(Arrays.asList(new Integer[]{4,5,1,6,2,7,3,8})));
+        tests[7] = solution.new Test(2,new int[]{1,99},new ArrayList<>(Arrays.asList(new Integer[]{1,99})));
+        int i = 0;
+        long runtimeCount = System.currentTimeMillis();//获取当前系统时间(毫秒)
+        try {
+            for (i = 0; i < total; i++) {
+                if(!solution.compare(tests[i].result,solution.GetLeastNumbers_Solution(tests[i].input,tests[i].k))){
+                    solution.printFail(i*100/total,String.valueOf(solution.GetLeastNumbers_Solution(tests[i].input,tests[i].k)));
+                    tests[i].printSelf();
+                    return;
+                }
+            }
+            solution.printSuccess();
+            int runtime = (int)(System.currentTimeMillis()-runtimeCount);
+            System.out.println("运行时间为："+runtime+"ms");
+        }catch (Exception e){
+            solution.printFail(i*100/total,"异常！");
+            tests[i].printSelf();
+            System.out.println("出现异常!");
+            e.printStackTrace();
+        }
+    }
+    private void printSuccess(){
+        System.out.println("恭喜！你通过了所有的测试用例");
+    }
+    private void printFail(int percent,String str){
+        System.out.println("你未能通过所有的测试用例！("+percent+"%)");
+        System.out.println("你的输出为："+str);
+    }
+    private boolean compare(ArrayList<Integer> test,ArrayList<Integer> standard){
+        if(test.size()!=standard.size()){
+            return false;
+        }
+        for(int i = 0;i<standard.size();i++){
+            if(!test.contains(standard.get(i))){
+                return false;
+            }
+        }
+        return true;
+    }
+}
+