Use thedistinct()Method in theArrayListto Find Unique Values in Java Use theHashSetto Find Unique Values in Java In Java, theArrayListcan’t prevent the list that contains any duplicate values. But sometimes, we need to extract only the unique values for numerous purposes. ...
importjava.util.ArrayList;publicclassDetails{publicstaticvoidmain(String[]args){ArrayList<Integer>al=newArrayList<Integer>();System.out.println("Initial size: "+al.size());al.add(1);al.add(13);al.add(45);al.add(44);al.add(99);System.out.println("Size after few additions: "+al.size(...
@ApiModel(value= "部门编辑对象", description = "部门编辑请求对象") publicclassDeptEditRequest { @ApiModelProperty(value= "主键id", example = "-1") @DecimalMin(value= "1", message = "角色id最小为1")privateLong id; @ApiModelProperty(value= "父部门id", example = "-1") @NotNull(messa...
queue.add(root);intqueueSize=root==null? 0:1;while(queueSize > 0){intmax=Integer.MIN_VALUE;for(inti=0; i< queueSize; i++){ TreeNode n=queue.poll();if(n.val >max) max=n.val;if(n.left !=null) queue.add(n.left);if(n.right !=null) queue.add(n.right); } list.add(max...
// arr:要查找的数组,predict:要查找的 key 字符串 或 [key,value] 数组,或 对象{key,value},fromIndex:要从数组中第一个元素开始查,默认为 0 functionfind(arr, predict, fromIndex = 0) { // 定义查找元素存在的函数,即当该函数满足条件,则说明可以找到,返回找到的第一个满足条件的对象 ...
.maptodouble(double::valueof); assertthat(decimalnumvaluesfound) .containsexactly(7854.455, -3.0, 34.56); 5. finding other types of numbers numbers can be expressed in other formats, which we can detect by adjusting our regular expressions. 5.1. scientific notation let’s find some numbers ...
...16个线程放到线程池中,让他们各跑各的数据: //开启16个线程,跑16个地市的数据 String[] cityArray = cities.split(","); List futures...= new ArrayList(); for (String city : cityArray) { ProcessRunnable runnable = new ProcessRunnable...redisTemplate.opsForValue().set("sal", JSON.to...
java.io.NotSerializableException: java.util.ArrayList$SubList org.redisson.command.CommandAsyncService.encodeMapValue(CommandAsyncService.java:669) org.redisson.RedissonObject.encodeMapValue(RedissonObject.java:351) org.redisson.RedissonMap.encodeMapKeys(RedissonMap.java:1051) org.redisson.RedissonMap.putAll...
btn.value = "删除" ; btn.onclick = function() { var b = document.getElementById(btn.id); dv.removeChild(b.nextSibling); //remove <BR> dv.removeChild(b.previousSibling); //file dv.removeChild(b); //btn --i; } dv.appendChild(btn); ...
result.put(ObjectUtils.identityToString(autowiringValue), autowiringValue);break; } } }// 这里理解就是注入同一个Bean的时候,先考虑同类型的其他Beanfor(String candidate : candidateNames) {// 如果不是自己,则判断该candidate到底能不能用来进行自动注入(@Bean(autowireCandidate = true))默认为trueif(!is...