最大值最小值平均值.java

编程打印数字1-9的乘法表。编写一个字符界面的Application程序

import java.applet.Applet;
import java.awt.Dimension;
import java.awt.Label;
import java.awt.TextField;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

public class opp5 extends Applet implements ActionListener
{
    TextField input1;

    TextField input2;

    TextField output1;

    TextField output2;

    TextField output3;

    int DataArray[] = new int[100];

    int DataInputed = 0;

    int max = 0;

    int min = 0;

    double total = 0;

    double avg = 0;
    
    String inputDatas2String = "";

    public void init()
    {
        Label prompt1 = new Label("Please input a number which you want to differ:");
        Label prompt2 = new Label("The data your have inputted are: ");
        input1 = new TextField(10);
        input2 = new TextField(50);
        input2.setEditable(false);

        output1 = new TextField(30);
        output2 = new TextField(30);
        output3 = new TextField(30);
        
        add(prompt1);
        add(input1);
        add(prompt2);
        add(input2);

        add(new Label("The max number is:"));
        add(output1);
        add(new Label("The min number is:"));
        add(output2);
        add(new Label("The avg number is:"));
        add(output3);
        
        input1.addActionListener(this);
        this.setSize(new Dimension(380, 180));
    }

    public void actionPerformed(ActionEvent e)
    {
        /*
         * when user press the key "Enter" in the input1 textField, occur an
         * ActionEvent object, then this method will execute.
         */ 
        if (e.getSource() == input1)
        {
            int inputData=0;
            try
            {
                inputData = Integer.parseInt(input1.getText());
            } catch (NumberFormatException e1)
            {
                input2.setText("you have input an invalid data, please re-enter a number!");
                input1.selectAll();
                //return;
            }
            
            DataArray[ DataInputed++] = inputData;
            
            if(DataInputed ==1)
            {
                max = DataArray[0];
                min = DataArray[0];
            }
            
            // display the input data in the input2 textfield.
            inputDatas2String =  inputDatas2String + input1.getText() +" , ";
            input2.setText(inputDatas2String);
            input1.selectAll();

            // find max && min
            for (int i = 0; i < DataInputed; i++)
            {
                if (DataArray[i] >= max)
                {
                    max = DataArray[i];
                } 
                if (DataArray[i] <= min)
                {
                    min = DataArray[i];
                }
            }

            // find avg
            total=0;
            for (int i = 0; i < DataInputed; i++)
            {
                total = total + DataArray[i];
                avg = total / DataInputed;
            }
            //avg = total / DataInputed;
            output1.setText(max+"");
            output2.setText( min+"");
            output3.setText( avg+"");
        }
    }
}