import Android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
/**
* Class which shows how to validate user input with regular expression
*
* @author FaYnaSoft Labs
*/
public class Main extends Activity {
private EditText editText;
private Button button;
@Override
public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); editText = (EditText) findViewById(R.id.textId); editText.setText("EditText element"); button = (Button) findViewById(R.id.btnId); button.setText("Check"); button.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { if(checkString(editText.getText().toString())) { editText.setText("Corect"); } } });
}
/** * This method checks if String is correct * @param s - String which need to check * @return value of matching */
private boolean checkString(String s) { return s.matches("\\w*[.](Java|cpp|class)");
}
} ---------------------
作者：swat1985
来源：CSDN
原文：https://blog.csdn.net/swat1985/article/details/83730271
版权声明：本文为博主原创文章，转载请附上博文链接！

正则表达式查找字符 文章分类:移动开发
String s_Result="Distance: 2.8km (about 9 mins)"; //Distance parsing
Pattern p = Pattern.compile("Distance: (\\d+(\\.\\d+)?)(.*?)\\b");
Matcher m = p.matcher(s_Result);
if(m.find()){ MatchResult mr=m.toMatchResult(); f_Distance=mr.group(1);//2.8 m_DistanceUnit=mr.group(3);//km
} //Time parsing
p = Pattern.compile("about (\\d+(\\.\\d+)?) (.*)\\b");
m = p.matcher(s_Result);
if(m.find()){ MatchResult mr=m.toMatchResult(); f_timeEst=mr.group(1);//9 m_timeEstUnit=mr.group(3);//min
}
或者
String s_Result="Distance: 2.8km (about 9 mins)";
Pattern p = Pattern.compile("(\\d+(\\.\\d+)?) ?(\\w+?)\\b");
Matcher m = p.matcher(s_Result);
while(m.find()){ MatchResult mr=m.toMatchResult(); String value=mr.group(1);//2.8 and 9 come here String units=mr.group(3);//km and mins come here
} 正则表达式以过滤特殊字符 在网上找了好久也没找到个合适的正则表达式以过滤特殊字符；自己学习了下，写了两个，实现要求。
Java 代码
// 过滤特殊字符  public   static   String StringFilter(String   str)   throws   PatternSyntaxException   {     // 只允许字母和数字       // String   regEx  =  "[^a-zA-Z0-9]";                     // 清除掉所有特殊字符  String regEx="[`~!@#$%^&*()+=|{}':;',\\[\\].<>/?~！@#￥%……& amp;*（）——+|{}【】‘；：”“’。，、？]";  Pattern   p   =   Pattern.compile(regEx);     Matcher   m   =   p.matcher(str);     return   m.replaceAll("").trim();     }     @Test         public    void   testStringFilter()   throws   PatternSyntaxException   {     String   str   =   "*adCVs*34_a _09_b5*[/435^*&城池()^$$&*). {}+.|.)%%*(*.中国}34{45[]12.fd'*&999下面是中文的字符￥……{}【】。，；’“‘”？";     System.out.println(str);     System.out.println(StringFilter(str));     }
---------------------
作者：swat1985
来源：CSDN
原文：https://blog.csdn.net/swat1985/article/details/83730271
版权声明：本文为博主原创文章，转载请附上博文链接！