在Java中,return 0和return null的区别是:1. return 0表示方法返回整数类型的值,通常用于表示方法执行成功并返回结果;2. return null表示方法返回空对象的引用,通常用于表示方法未能执行成功或没有返回有效的结果。因此,return 0和return null的含义和用法不同,需要根据具体的业务场景来选择使用哪种...
int[] arr3=new int[3]; arr3[0]=1; arr3[1]=5; arr3[2]=6; 方式二:不使用运算符new int[] arr = { 1, 2, 3, 4, 5 }; int[] arr2 = new int[] { 1, 2, 3, 4, 5 }; 3.数组遍历public static void main(String[] args) { int[] x = { 1, 2, 3 }; for (int y...
根据《Java编程思想:第四版》4.5节中介绍:return语句作为一个无条件的分支,无需判断条件即可发生。return语句主要有两个用途:一方面用来表示一个方法返回的值(假定没有void返回值),另一方面是指它导致该方法退出,并返回那个值。根据方法的定义,每一个方法都有返回类型,该类型可以是基本类型,也...
public static void main(String[] args) { for(int i=1;i<4;i++) { if(i==2) { return; } System.out.println("i的值为"+i); } } } 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 例子2:(在自己写的返回值类型为void的方法中) 代码2: package Sort; public class returnyongfa { p...
varmatrices =newDictionary<string,int[][]> { ["A"] = [[1,2,3,4], [4,3,2,1] ], ["B"] = [[5,6,7,8], [8,7,6,5] ], }; CheckMatrices(matrices,4);voidCheckMatrices(Dictionary<string,int[][]> matrixLookup,inttarget){foreach(var(key, matrix)inmatrixLookup) {for(intro...
varmatrices =newDictionary<string,int[][]> { ["A"] = [[1,2,3,4], [4,3,2,1] ], ["B"] = [[5,6,7,8], [8,7,6,5] ], }; CheckMatrices(matrices,4);voidCheckMatrices(Dictionary<string,int[][]> matrixLookup,inttarget){foreach(var(key, matrix)inmatrixLookup) {for(intro...
varmatrices =newDictionary<string,int[][]> { ["A"] = [[1,2,3,4], [4,3,2,1] ], ["B"] = [[5,6,7,8], [8,7,6,5] ], }; CheckMatrices(matrices,4);voidCheckMatrices(Dictionary<string,int[][]> matrixLookup,inttarget){foreach(var(key, matrix)inmatrixLookup) {for(intro...
private int value2; public CustomObject(int value1, int value2) { this.value1 = value1; this.value2 = value2; } public int getValue1() { return value1; } public int getValue2() { return value2; } } public static CustomObject getMultipleValues() { return new CustomObject(1, 2...
varmatrices =newDictionary<string,int[][]> { ["A"] = [[1,2,3,4], [4,3,2,1] ], ["B"] = [[5,6,7,8], [8,7,6,5] ], }; CheckMatrices(matrices,4);voidCheckMatrices(Dictionary<string,int[][]> matrixLookup,inttarget){foreach(var(key, matrix)inmatrixLookup) {for(intro...
publicstaticrefintFind(int[,] matrix, Func<int,bool> predicate){for(inti =0; i < matrix.GetLength(0); i++)for(intj =0; j < matrix.GetLength(1); j++)if(predicate(matrix[i, j]))returnrefmatrix[i, j];thrownewInvalidOperationException("Not found"); } ...