Put your sample text here
  
  
  

 
CategoryModel model = new SimpleCategoryModel();
// update chart per letter
void processString(String targetString)
{   
    int[] alphabet = {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0};
    int total = 0;
    int targetLen = targetString.length();
    char[] targetArray = targetString.toCharArray();

    for (int i = 0; i < targetLen; i++)
    {
        // count each letter and ignore other characters
        if (Character.isLetter(targetArray[i]))
        {
            int ch = Character.toUpperCase(targetArray[i]) - 0x41;
            alphabet[ch]++;
            total++;
        }
    }
    model.clear();   
    for (char i = 'A'; i <= 'Z'; i++)
    {
        // send each letter and its frequency percentage to the chart
        Double freq = new Double(alphabet[i - 0x41]);
        model.setValue(i.toString(), i.toString(), (freq / targetLen) * 100);
    }
    chart.setModel(model);
} 
// process current text
processString(targetText.value);
]]>

Author: gbowerman

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