break

I was wondering if it is a "bad practice" to use a break statement to exit a loop instead of fulfilling the loop condition? I do not have enough insight in Java and the JVM to know how a loop is handled, so I was wondering if I was overlooking something critical by doing so. The focus of this question: is there a specific performance overhead? Good lord no. Sometimes there is a possibility that something can occur in the loop that satisfies the overall requirement, without satisfying the logical loop condition. In that case, break is used, to stop you cycling around a loop pointlessly. Example

/**************枚举*****************/ // public enum Colors{ // Red,Yellow,Blue,Black,White // } // public static void main(String[] args) { // Colors c = Colors.Yellow; // System.out.println(c);//输出枚举 // System.out.println(c.ordinal());//输出枚举对应的序号(第一个枚举元素是0，后面的依次+1) // // //将字符串转换为枚举 // Colors c2 = Enum.valueOf(Colors.class, "Blue"); // if(c2 == Colors.Blue){ // System.out.println("转换成功！"); // } // //枚举在switch中的使用 // switch (c2) { // case Red: // System.out.println("红色！"); // break; // case Yellow: // System.out.println("黄色！"); // break; // case Blue: // System.out.println("蓝色！"); // break; //

Is breaking and continuing the only uses of labeled statements in Java? When have you used Labeled Statements in your programs? Sorry the code snippet has been deleted. I am splitting the question JLS 14.7 Labeled statements (edited for clarity) Statements may have label prefixes ( Identifier : Statement ). The Identifier is declared to be the label of the immediately contained Statement . Unlike C and C++, the Java programming language has no goto statement; identifier statement labels are used with break ( §14.15 ) or continue ( §14.16 ) statements appearing anywhere within the labeled