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...
package com.journaldev.javadowhileloop; public class DoWhileTrueJava { public static void main(String[] args) throws InterruptedException { do { System.out.println("Start Processing inside do while loop"); // look for a file at specific directory // if found, then process it, such as inser...
Example int i = 0; while (i < 5) { System.out.println(i); i++; } Try it Yourself » Note: Do not forget to increase the variable used in the condition, otherwise the loop will never end!Exercise? How many times will the following loop execute?int i = 0;while (i < 4) ...
inti=1;do{System.out.println(i);i++;}while(i<=5); The program outputs: 12345 3. Difference betweenwhileLoop anddo-whileLoop The main difference betweendo-whileloop andwhile-loopis thatdo-whileevaluates its expression at the bottom of the loop instead of the top. Therefore, thestatements ...
do {} while (i < max)is similar like before, only difference is that the loop body will be execute at least once. while(true) { if (i < max) {break;}}Whenever seebreak; will jump out from thewhileloop. max = 5; i = 0; ...
The Java programming language also provides a do-while statement, which can be expressed as follows: do { statement(s) } while (expression); The difference between do-while and while is that do-while evaluates its expression at the bottom of the loop instead of the top. Therefore, the ...
();// a retry loop with exponential back-off delays // (this gives VM some time to do it's job) boolean interrupted = false; try { long sleepTime = 1; int sleeps = 0; while (true) { if (tryReserveMemory(size, cap)) { return; } if (sleeps >= MAX_SLEEPS) { break; } if...
do-while 循环:先执行一次循环体,然后从 i = 1 开始,每次循环 i 增加1,直到 i 不小于 5 为止。 增强型 for 循环:遍历数组中的每个元素,依次输出每个元素的值。 1.4. 跳转结构 在Java中,跳转结构用于控制程序的执行流程。 1.4.1 break 用途: 用于终止当前循环(for、while、do-while)或switch语句。
break WAF_LOOP_ONE; }else { System.out.println(i+":"+j); } } } } } 2。案例 转载:https://www.knowledgedict.com/tutorial/java-break-out-of-nested-loops.html java 如何跳出内嵌多重循环的方法主要有两种,一种是利用 Java 的 label,另一种是巧妙地将相关的循环逻辑抽出到单独的方法里,然后在...
Java Tutorial(Java操作MongoDB入门) Introduction 介绍 This page is a brief overview of working with the MongoDB Java Driver. 这是使用MongoDB java驱动的简单说明。 For more information about the Java API, please refer to the online API Documentation for Java Driver ...