Java print array example shows how to print an array in Java in various ways as well as print 2d array (two dimensional) or multidimensional array.
How to print an array in Java?
There are various ways using which you can print an array in Java as given below.
1) Using while loop
We can use a while loop to print the array. The below-given code example prints an array of String.
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String[] strArray = {"One","Two","Three"}; int count = 0; while( count < strArray.length ){ System.out.println( strArray[count] ); count++; } |
Output
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One Two Three |
2) Using for loop
Probably the simplest way to print an array is to print it using a for loop as given below. The array index starts at 0 and go up to array length – 1 index.
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String[] strArray = {"One","Two","Three"}; for(int i = 0 ; i < strArray.length; i++){ System.out.println(strArray[i]); } |
Output
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1 2 3 |
One Two Three |
3) Using enhanced for loop
If you are using Java 1.5 or a later version, you can use the enhanced for loop instead of the for loop as given below.
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String[] strArray = {"One","Two","Three"}; for(String str : strArray) System.out.println(str); |
Output
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1 2 3 |
One Two Three |
4) Using Arrays class
The Arrays class provides many useful utility methods and the toString method is one of them. It converts array to string which can then be printed as given below.
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String[] strArray = {"One","Two","Three"}; System.out.println( Arrays.toString(strArray) ); |
Output
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1 |
[One, Two, Three] |
If you want to remove square brackets and comma from the output, you can remove them using a regular expression as given below.
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System.out.println( Arrays.toString(strArray).replaceAll("\\[|\\]|,", "") ); |
Output
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1 |
One Two Three |
5) Using Java 8 Stream
If you are using Java 8 or a later version, you can use the stream to print the array as given below.
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String[] strArray = {"One","Two","Three"}; Arrays.stream(strArray).forEach(System.out::println); |
Output
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One Two Three |
6) Using Java 8 String join
If you are using Java 8, you can use the join method of the String class to join array elements by delimiter as given below.
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String[] strArray = {"One","Two","Three"}; System.out.println( String.join(" ", strArray) ); |
Output
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1 |
One Two Three |
7) Using Apache Commons library
Finally, if you are using the Apache Commons library, you can use the join method of StringUtils class to join the array elements and print them as given below.
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String[] strArray = {"One","Two","Three"}; System.out.println( StringUtils.join(strArray, ' ') ); |
Output
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One Two Three |
The join method is overloaded for byte array, char array, double array, float array, int array, long array, and an Object array.
How to print a 2D array (two-dimensional array)?
If you have a two-dimensional array, you can print it using the below-given approaches.
a) Using for loop
You can use for loop to print a two-dimensional array as given below.
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int[][] intTwoDArray = {{0,0}, {1,1}}; //number of rows, in our case 2 for(int i = 0; i < 2 ; i++){ //number of columns, in our case 2 for(int j = 0; j < 2; j++){ System.out.println(intTwoDArray[i][j]); } } |
Output
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0 0 1 1 |
b) Using Arrays class
You can also use the deepToString method of the Arrays class to print two-dimensional array as given below.
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int[][] intTwoDArray = {{0,0}, {1,1}}; System.out.println( Arrays.deepToString(intTwoDArray) ); |
Output
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1 |
[[0, 0], [1, 1]] |
This example is a part of the Java Array tutorial with examples.
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