[JAVA] JAVA8-String.join string concatenation

JAVA8String.join string concatenation

List names=new ArrayList(); 
names.add(“1”); 
names.add(“2”); 
names.add(“3”); 
System.out.println(String.join(“-“, names));

String[] arrStr=new String[]{“a”,”b”,”c”}; 
System.out.println(String.join(“-“, arrStr));

Output:

1-2-3 
a-b-c

String.join/StringUtils.join

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