20171119
http://o7planning.org/en/10525/how-to-add-external-libraries-to-android-project-in-android-studio
///
libs->commons-lang3-3.7.jar->Right click jar files, select "Add as Library..":->OK
///
package jp.co.wata.myapplication;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import org.apache.commons.lang3.StringUtils;
public class MainActivity extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
CheckNumeric checkNumeric=new CheckNumeric();
checkNumeric.test();
}
}
class CheckNumeric {
public void test() {
String text1 = "0123a4";
String text2 = "01234";
boolean result1 = StringUtils.isNumeric(text1);
boolean result2 = StringUtils.isNumeric(text2);
System.out.println(text1 + " is a numeric? " + result1);
System.out.println(text2 + " is a numeric? " + result2);
}
}