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  • 判断参数是否符合要求的一个类

    import java.util.Collection;
    
    public class Args {
    
        public static void check(final boolean expression, final String message) {
            if (!expression) {
                throw new IllegalArgumentException(message);
            }
        }
    
        public static void check(final boolean expression, final String message, final Object... args) {
            if (!expression) {
                throw new IllegalArgumentException(String.format(message, args));
            }
        }
    
        public static <T> T notNull(final T argument, final String name) {
            if (argument == null) {
                throw new IllegalArgumentException(name + " may not be null");
            }
            return argument;
        }
    
        public static <T extends CharSequence> T notEmpty(final T argument, final String name) {
            if (argument == null) {
                throw new IllegalArgumentException(name + " may not be null");
            }
            if (TextUtils.isEmpty(argument)) {
                throw new IllegalArgumentException(name + " may not be empty");
            }
            return argument;
        }
    
        public static <T extends CharSequence> T notBlank(final T argument, final String name) {
            if (argument == null) {
                throw new IllegalArgumentException(name + " may not be null");
            }
            if (TextUtils.isBlank(argument)) {
                throw new IllegalArgumentException(name + " may not be blank");
            }
            return argument;
        }
    
        public static <E, T extends Collection<E>> T notEmpty(final T argument, final String name) {
            if (argument == null) {
                throw new IllegalArgumentException(name + " may not be null");
            }
            if (argument.isEmpty()) {
                throw new IllegalArgumentException(name + " may not be empty");
            }
            return argument;
        }
    
        public static int positive(final int n, final String name) {
            if (n <= 0) {
                throw new IllegalArgumentException(name + " may not be negative or zero");
            }
            return n;
        }
    
        public static long positive(final long n, final String name) {
            if (n <= 0) {
                throw new IllegalArgumentException(name + " may not be negative or zero");
            }
            return n;
        }
    
        public static int notNegative(final int n, final String name) {
            if (n < 0) {
                throw new IllegalArgumentException(name + " may not be negative");
            }
            return n;
        }
    
        public static long notNegative(final long n, final String name) {
            if (n < 0) {
                throw new IllegalArgumentException(name + " may not be negative");
            }
            return n;
        }
    
    }
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  • 原文地址:https://www.cnblogs.com/softidea/p/3334379.html
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