for (int i = 0; i < 5; i++) { System.out.println(i); } Try it Yourself » Example explainedStatement 1 sets a variable before the loop starts (int i = 0).Statement 2 defines the condition for the loop to run (i must be less than 5). If the condition is true, the loo...
Note that all expressions in thefor-loopare optional. In case, we do not provide theterminationexpression, we must terminate the loop inside the statements else it can result in aninfinite loop. 2. Java For-loop Example In the following program, we are iterating over an array ofintvalues....
public class ForLoopExample { public static void main(String[] args) { for (int i = 0; i ...
第四步:第三步后,程序跳转到第二步,重新评估循环条件,决定是继续执行在for循环内部的语句还是跳出for循环执行后面的语句。 简单for循环示例 1 2 3 4 5 6 7 classForLoopExample { publicstaticvoidmain(String args[]){ for(inti=10; i>1; i--){ System.out.println("The value of i is: "+i); ...
通过上面的测试结果我们可以发现,在集合相对较小的情况下,for loop和foreach两者的耗时基本上没有什么差别,当集合的数据量相对较大的时候,可以明显看的出来,for loop的效率要比foreach的效率高。 至于为什么在大数据量的情况下forEach的效率要比for低,我们就要看下forEach的原理了。forEach其实不是一种新的语法,而...
class ForLoopExample2 { public static void main(String args[]){ for(int i=1; i>=1; i++){ System.out.println("The value of i is: "+i); } } } 1. 2. 3. 4. 5. 6. 7. 这是一个无限循环,因为条件永远不会返回false。
迭代是所有编程语言中最基本的要求之一,而“ for”是Java中迭代次数最广泛使用的循环。 我们将看到Java for循环迭代技术的发展。 (Java for loop Evolution) We will work on an example for displaying names of actors from aCollection. For the sake of simplicity let’s take aListand set this up: ...
1. Java简单For循环 简单的for循环与C/C++相同。我们可以初始化变量,检查条件和增加/减少变量的值。 语法: for(initialization;condition;incr/decr){//code to be executed} Java 执行流程图如下所示 - 示例: publicclassForExample{publicstaticvoidmain(String[] args){for(inti=1;i<=10;i++){ ...
For example, if you want to show a message 100 times, then you can use a loop. It's just a simple example; you can achieve much more with loops. In the previous tutorial, you learned about Java for loop. Here, you are going to learn about while and do...while loops. Java while...
public class ForLoopExample { public static void main(String[] args) { // 打印1到10 for (int i = 1; i <= 10; i++) { System.out.println(i); } } } 上面的示例中,我们使用for循环打印1到10。在for循环中,我们首先定义了一个int类型的变量i,并将其初始化为1。然后,我们检查i是否小于...