Understanding the Concatenation of Strings in Java

Concatenation in the Java programming language is the operation of joining two strings together. You can join strings using either the addition () operator or the String’s concat() method. Using the Operator Using the operator is the most common way to concatenate two strings in Java. You can provide either a variable, a number, or a String literal (which is always surrounded by double quotes). To combine the strings â€Å"I’m a† and â€Å"student†, for example, write: I’m a student Be sure to add a space so that when the combined string is printed, its words are separated properly. Note above that student starts with a space, for example. Combining Multiple Strings Any number of operands can be strung together, for instance: I’m a student ! And so are you. Using the Operator in a Print Statement Frequently, the operator is used in a print statement. You might write something like: System.out.println(pan handle); This would print: panhandle Combining Strings Across Multiple Lines Java disallows literal strings to span more than a line. Using the operator prevents this: String quote Nothing in all the world is more dangerous than sincere ignorance and conscientious stupidity.;   Combining a Mixture of Objects The  operator   normally acts as an  arithmetic operator  unless one of its  operands  is a String. If so, it converts the other operand to a String before joining the second operand to the end of the first operand. For example, in the example below, age is an integer, so the operator will first convert it to a String and then combine the two strings. (The operator does this behind the scenes by calling its toString() method; you won’t see this occur.) int age 12;System.out.println(My age is age); This would print: My age is 12 Using the Concat Method The String class has a method concat() that performs the same operation. This method acts on the first string and then takes the string to combine as a parameter: public String concat (String str)​   For example: String myString I have decided to stick with love.;myString myString.concat( Hate is too great a burden to bear.);System.out.println(myString); This would print: I have decided to stick with love. Hate is too great a burden to bear. Differences Between the Operator and the Concat Method You may be wondering when it makes sense to use the operator to concatenate, and when you should use the concat() method.  Here are some differences between the two: The concat() method can combine only String objects — it must be called on a String object, and its parameter must be a String object. This makes it more restrictive than the operator since the operator silently converts any non-string argument to a string.The concat() method throws a NullPointerException if the object has a null reference, while the operator deals with a null reference as a â€Å"null† string.The concat()) method is capable of combining only two strings – it cannot take multiple arguments. The operator can combine any number of strings. For these reasons, the operator is more often used to combine strings. If you are developing a large-scale application, however, performance can differ between the two because of the way that Java handles string conversion, so be aware of the context in which you are combining strings.

Effects Of The Panic Of 1837 - 1681 Words

The panic of 1837 was arguably more devastating than the depression of the 1930’s, yet less well known. During the period of roughly 7 years between 1837 and the mid 1840’s the U.S. economy underwent massive economic hardships and consequences which many economists ultimately believe helped lead to the American civil war in 1861. Causes for the panic include: government policies, speculative lending practices, decline in cotton prices, a collapsing land bubble, international cash flow and restrictive lending policies (Wiki). Historians believe that it was Jackson s policies that lead to the inflationary boom and the Panic of 1837, which suspended the convertibility of paper money into specie. Historians point the finger to three of Jackson s policies. The first was Jackson s veto of a bill to recharter the second Bank of the United States, in 1832. The federal reserves of the Bank of the United States were distributed to the state-chartered banks that were favored by Ja ckson. Historians believe that this led to the reserve ratio being reduced because there was no central bank regulating the banks. This led to an increase in the money supply and inflation (Sylla). The second policy was the Deposit Act of 1836, which was the distribution of the surplus in paper money to the states, after the National Debt was paid (Sylla, Rothbard 99). This extra money caused an increase in spending by the states (Rothbard 100). The last policy led to the Panic of 1837; the SpecieShow MoreRelatedAmerica s First Great Depression : Economic Crisis And Political Disorder Essay856 Words   |  4 Pages Alasdair Roberts book entitled America s First Great Depression: Economic Crisis and Political Disorder After The Panic of 1837 introduces the reader to challenges the United States dealt with in terms of economic and political crisis. 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Cigarette Smoking Health Effects in Men free essay sample

An examination of the impacts of cigarette smoking on health with focus on men smokers. Cigarette smoking is the single most preventable cause of premature death. Men who smoke are most at risk of death from lung cancer. The author argues that smokers are in great danger of dangerous health effects from smoking and discusses the various impacts caused by smoking. Causing more than 400,000 deaths each year, tobacco usage is the leading preventable cause of death in the United States. Additionally, the direct medical costs amount more than $50 billion per year. More people are harmed and killed by smoking every year than they die of alcohol, drug abuse, AIDS, murders, car crashes, fires, and suicides. Nationally, more than 5 million years of potential life are lost each year as a result of smoking. Every day, nearly 3,000 young people under the age of 18 become regular smokers. Approximately 80% of adult smokers start smoking before the age of 18. We will write a custom essay sample on Cigarette Smoking Health Effects in Men or any similar topic specifically for you Do Not WasteYour Time HIRE WRITER Only 13.90 / page Furthermore, approximately five million children presently living will die prematurely because of the decision to smoke cigarettes at adolescence.