搜索引擎及搜索引擎优化(SEO)实验 - 图文(3)

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7. 选做：提供网络蜘蛛程序完整源代码及实际运行结果界面截屏（实验报告中需包含源代码和界面截屏）。

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import javax.swing.*;

import java.awt.*;// need this to access the color object /*

* IntegerVerifier.java * */ /**

* Input Verifier to verifier integer text fields *

* Checks for valid integer input, and to see if the number is between a * specified max and min value. *

* @author Mark Pendergast */

public class IntegerVerifier extends javax.swing.InputVerifier { /** listener to get valid/invalid data reports */ private VerifierListener listener = null;

/** blank fields allowed, true for ok, false for error */

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private boolean blankOk = false; /** minimum valid value */

int minValue = Integer.MIN_VALUE; /** maximum valid value*/

int maxValue = Integer.MAX_VALUE; /** Creates a new instance of IntegerVerifier *

* @param alistener VerifierListener to receive invalid/valid data class (null means no listener)

* @param blankok if true, then the field can be left blank * @param min minimum valid value * @param max maximum valid value */

public IntegerVerifier(VerifierListener alistener, boolean blankok, int min, int max) { listener = alistener; blankOk = blankok; minValue = min; maxValue = max; } /**

* Verifies contents of the specified component *

* @param jComponent the component to check * @return true if the component is ok, else false * */

public boolean verify(javax.swing.JComponent jComponent) { JTextField thefield = (JTextField)jComponent; String input = thefield.getText(); int number;

input = input.trim(); // strip off leading and trailing spaces as these gives Integer.parseInt problems

if(input.length() == 0 && blankOk) {

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