Implementation method of Java array deduplication

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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