{"id":65482,"date":"2026-01-25T02:16:33","date_gmt":"2026-01-24T18:16:33","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/65482.html"},"modified":"2026-01-25T02:16:33","modified_gmt":"2026-01-24T18:16:33","slug":"java%e8%87%aa%e5%ad%a6-01%e8%af%ad%e6%b3%95%e5%8c%ba%e5%88%ab%ef%bc%882%ef%bc%89","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/65482.html","title":{"rendered":"Java\u81ea\u5b66-01\u8bed\u6cd5\u533a\u522b\uff082\uff09"},"content":{"rendered":"

\u4e00.\u6570\u7ec4<\/h2>\n

java\u6570\u7ec4\u5c5e\u4e8e\u5f15\u7528\u7c7b\u578b，\u6570\u7ec4\u5143\u7d20\u5b58\u50a8\u5728\u5806\u7a7a\u95f4，Java\u7684\u5806\u5185\u5b58\u7533\u8bf7\u4f1a\u81ea\u52a8\u8fdb\u884c\u521d\u59cb\u5316<\/p>\n

\u5728Java\u4e2d，\u5b57\u7b26\u6570\u7ec4！=\u5b57\u7b26\u4e32（\u5b57\u7b26\u6570\u7ec4：char[]\u00a0 \u00a0 \u00a0 \u00a0\u5b57\u7b26\u4e32：String）<\/p>\n

\u6570\u7ec4\u7684arr\u662f\u54c8\u5e0c\u503c（16\u8fdb\u5236），\u4e0d\u662f\u5730\u5740<\/p>\n

\/\/\u4e24\u79cd\u5f62\u5f0f
\nint[] arr1;
\nint arr2[] = {};
\nint [] arr3 = {};\/\/\u63a8\u8350\u8fd9\u4e00\u79cd<\/p>\n

\/\/\u5b9a\u4e49\u7684\u65f6\u5019\u6307\u5b9a\u6570\u7ec4\u5143\u7d20
\nint[] arr4 = new int[] {1,2,3,4};
\nint[] arr5 = {1,2,3,4};<\/p>\n

\/\/\u5b9a\u4e49\u7684\u65f6\u5019\u6307\u5b9a\u6570\u7ec4\u957f\u5ea6
\nint[] arr6 = new int[2];
\narr6[0]=1;
\narr6[1]=2;
\narr6[2]=3;<\/p>\n

\/\/\u591a\u7ef4\u6570\u7ec4
\nint[][][] arr7;
\nint[] arr8[][];<\/p>\n

public static void main(String[] args){
\n int[] array = new int[] {11,22,33};
\n System.out.println(array);
\n} <\/p>\n

\"\"<\/p>\n

\u4e8c.\u65b9\u6cd5<\/h2>\n

\u65b9\u6cd5\u7684\u4e66\u5199\u683c\u5f0f<\/p>\n

\u4fee\u9970\u7b26 \u8fd4\u56de\u503c\u7c7b\u578b \u65b9\u6cd5\u540d（\u53c2\u6570\u5217\u8868）{<\/p>\n

\u65b9\u6cd5\u4f53<\/p>\n

}<\/p>\n

\u4e09.\u53ef\u53d8\u53c2\u6570<\/h2>\n

\u53ef\u53d8\u53c2\u6570\u5fc5\u987b\u662f\u65b9\u6cd5\u4e2d\u7684\u6700\u540e\u4e00\u4e2a\u53c2\u6570 \u4e3e\u4f8b：JDK\u767d\u5e26\u7684 Svstem.out.printf \u65b9\u6cd5\u4f7f\u7528\u4e86\u53ef\u53d8\u53c2\u6570，\u683c\u5f0f\u5b57\u7b26\u4e32\u53c2\u8003API\u6587\u6863\u7684java.util.Formatter\u7c7b<\/p>\n

public class Main {
\n public static void main(String[] args){
\n System.out.println(sum(10,20,30));
\n }
\n public static int sum(int… numbers){
\n int result = 0;|
\n for (int num : numbers){
\n result += num;
\n }
\n return result;
\n }
\n} <\/p>\n

\u5176\u4e2d\u7684for (int num : numbers)\u662f\u589e\u5f3afor\u5faa\u73af<\/p>\n

\u56db.\u53c2\u6570\u4f20\u9012<\/h2>\n

\u57fa\u672c\u7c7b\u578b（byte\/char\/short\/int\/long\/float\/double\/boolean）\u4f5c\u4e3a\u53c2\u6570\u7684\u662f\u503c\u4f20\u9012，\u4f5c\u4e3a\u8fd4\u56de\u503c，\u8fd4\u56de\u7684\u662f\u503c<\/p>\n

\u5f15\u7528\u7c7b\u578b（\u5f15\u7528\u7c7b\u578b：\u6570\u7ec4\u3001\u5bf9\u8c61）\u4f5c\u4e3a\u53c2\u6570\u662f\u5f15\u7528\u4f20\u9012（\u5730\u5740\u4f20\u9012）<\/p>\n

\u4e94.\u65b9\u6cd5\u7b7e\u540d\u4e0e\u65b9\u6cd5\u7684\u91cd\u8f7d<\/h2>\n

\u65b9\u6cd5\u7b7e\u540d\u75312\u90e8\u5206\u7ec4\u6210：\u65b9\u6cd5\u540d，\u53c2\u6570\u7c7b\u578b<\/p>\n

eg:\u4e0b\u9762\u65b9\u6cd5\u7684\u65b9\u6cd5\u7b7e\u540d\u662f：sum(int,long,double)<\/p>\n

public static double sum(int i, long l, double d){
\n return i + l + d;
\n} <\/p>\n

\u5728\u540c\u4e00\u4e2a\u7c7b\u4e2d，\u4e0d\u80fd\u5b9a\u4e492\u4e2a\u65b9\u6cd5\u7b7e\u540d\u4e00\u6837\u7684\u65b9\u6cd5<\/p>\n

Java\u7684\u65b9\u6cd5\u652f\u6301\u91cd\u8f7d：\u65b9\u6cd5\u540d\u76f8\u540c，\u65b9\u6cd5\u7b7e\u540d\u4e0d\u540c（\u53c2\u6570\u4e2a\u6570\u4e0d\u540c，\u53c2\u6570\u7c7b\u578b\u4e0d\u540c) \u91cd\u8f7d\u4e0e\u8fd4\u56de\u503c\u7c7b\u578b\u3001\u53c2\u6570\u540d\u79f0\u65e0\u5173<\/p>\n

\u516d.\u6808\u5e27<\/h2>\n

\u6808\u5e27\u968f\u7740\u65b9\u6cd5\u7684\u8c03\u7528\u800c\u521b\u5efa，\u968f\u7740\u65b9\u6cd5\u7ed3\u675f\u800c\u9500\u6bc1，\u5b58\u50a8\u4e86\u65b9\u6cd5\u7684\u5c40\u90e8\u53d8\u91cf\u4fe1\u606f<\/p>\n

\u5c40\u90e8\u53d8\u91cf\u8868\u7684\u5b58\u50a8\u673a\u5236<\/p>\n

\u5c40\u90e8\u53d8\u91cf\u8868\u4ee5\u53d8\u91cf\u69fd（Slot）\u4e3a\u5b58\u50a8\u5355\u5143，\u4e0d\u540c\u7c7b\u578b\u6570\u636e\u5360\u7528\u4e0d\u540c\u6570\u91cf\u7684Slot：<\/p>\n