Convert 2D binary matrix to black/white image in java

Question

I am new for java. I have 2D binary matrix with only 1s and 0s now. I want to save it as jpg image(black and white) with same width and height. How could I realize that? I t

Answer 1

JHeatChart does this job as well without you having to create a custom image library.

http://www.javaheatmap.com/

// Create some dummy data.
double[][] data = new double[][]{{3,2,3,4,5,6},
                                 {2,3,4,5,6,7},
                                 {3,4,5,6,7,6},
                                 {4,5,6,7,6,5}};

// Step 1: Create our heat map chart using our data.
HeatChart map = new HeatChart(data);

// Step 2: Customise the chart.
map.setTitle("This is my heat chart title");
map.setXAxisLabel("X Axis");
map.setYAxisLabel("Y Axis");

// Step 3: Output the chart to a file.
map.saveToFile(new File("java-heat-chart.png"));

What you are essentially trying to do is make a heat map. And instead of a range of values ranging from 0 to whatever, you have a range of 0 and 1.

Replace double[][] data = new double[][](//etc); with your boolean array.