StringUtils.java

package com.kickstarter.libs.utils;

import android.support.annotation.NonNull;
import android.support.annotation.Nullable;
import android.util.Patterns;

public final class StringUtils {
  private StringUtils() {}

  public static boolean isEmail(final @NonNull CharSequence str) {
    return Patterns.EMAIL_ADDRESS.matcher(str).matches();
  }

  public static boolean isEmpty(final @Nullable String str) {
    return str == null || str.trim().length() == 0;
  }

  public static boolean isPresent(final @Nullable String str) {
    return !isEmpty(str);
  }
}