public class regex {
/**
* @param args
*/
public static void main(String[] args) {
// TODO Auto-generated method stub
String pattern="^Q[^u]\\d+\\.";
String input="QA777. is the next flight,It is on time.";
RE r=new RE(pattern);
boolean found=r.match(input);
System.out.println(pattern+(found ? "匹配" :"不匹配")+input);
//以Q開頭並以.結尾,中間有多個字符
}
}
輸出結果:
^Q[^u]\d+\.匹配QA777. is the next flight,It is on time.
正則表達式公共API很大,它在程序中匹配的一般步驟是:
1.通過調用靜態方法Pattern.compile()創建一個模式;
2.爲每一個String調用pattern.matcher(CharSequence)以從模式中請求一個matcher;
3在結果中調用一次或多次finder方法;
例如:
Matcher m= Pattern.compile(patt).matcher(line);
if(m.find())
System.out.println(line+"matches"+patt);