Implementation method of Java array deduplication
- 王林forward
- 2023-05-06 15:46:081513browse
1. Loop comparison
Loop comparison to see if the value of each element is consistent. I won’t go into details about this, mainly the second method
2. Use hashSet to remove duplicates
HashSet is a set without duplicate elements, implemented by hashMap, unordered, and allows null, but only allows one null value. Paste the code below for personal testing.
public boolean checkIsRepeat(String[] arrs){
HashSet<String> hashSet = new HashSet<>();
for(int i = 0 ; i < arrs.length; i++){
hashSet.add(arrs[i].trim());
}
if(hashSet.size() == arrs.length){
return true;
}
return false;
}
What are the basic data types of java
The basic data types of Java are divided into:
1. Integer type, used to represent the data type of integer.
2. Floating point type, a data type used to represent decimals.
3. Character type. The keyword of character type is "char".
4. Boolean type is the basic data type that represents logical values.
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