Converting a String array into an int Array in java

Suppose, for example, that we have a arrays of strings:

String[] strings = {"1", "2", "3"};

With Lambda Expressions^{[1] [2]} (since Java 8), you can do the next ▼:

int[] array = Arrays.asList(strings).stream().mapToInt(Integer::parseInt).toArray();

▼ This is another way:

int[] array = Arrays.stream(strings).mapToInt(Integer::parseInt).toArray();

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Notes

1. Lambda Expressions in The Java Tutorials.

2. Java SE 8: Lambda Quick Start}

To get rid of additional whitespace, you could change the code like this:

intarray[i]=Integer.parseInt(str.trim()); // No more Exception in this line

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