新增test

test.java

@@ -0,0 +1,72 @@
+import java.util.Scanner;
+public class test {
+    // 将字符串转换为十进制
+    public static int toDecimal(String value, int base) {
+        return Integer.parseInt(value, base);
+    }
+
+    // 将十进制转换为指定进制
+    public static String fromDecimal(int value, int base) {
+        return Integer.toString(value, base).toUpperCase();
+    }
+
+    public static void main(String[] args) {
+        Scanner scanner = new Scanner(System.in);
+
+        System.out.println("请选择转换类型：");
+        System.out.println("1. 二进制");
+        System.out.println("2. 八进制");
+        System.out.println("3. 十进制");
+        System.out.println("4. 十六进制");
+        System.out.print("请输入源进制（1-4）: ");
+        int sourceBase = scanner.nextInt();
+
+        System.out.print("请输入目标进制（1-4）: ");
+        int targetBase = scanner.nextInt();
+
+        System.out.print("请输入要转换的数字: ");
+        String value = scanner.next();
+
+        int decimalValue;
+
+        // 将输入的值转换为十进制
+        switch (sourceBase) {
+            case 1:
+                decimalValue = toDecimal(value, 2);
+                break;
+            case 2:
+                decimalValue = toDecimal(value, 8);
+                break;
+            case 3:
+                decimalValue = toDecimal(value, 10);
+                break;
+            case 4:
+                decimalValue = toDecimal(value, 16);
+                break;
+            default:
+                throw new IllegalArgumentException("无效的源进制");
+        }
+
+        // 将十进制值转换为目标进制
+        String result;
+        switch (targetBase) {
+            case 1:
+                result = fromDecimal(decimalValue, 2);
+                break;
+            case 2:
+                result = fromDecimal(decimalValue, 8);
+                break;
+            case 3:
+                result = fromDecimal(decimalValue, 10);
+                break;
+            case 4:
+                result = fromDecimal(decimalValue, 16);
+                break;
+            default:
+                throw new IllegalArgumentException("无效的目标进制");
+        }
+
+        System.out.println("转换结果: " + result);
+        scanner.close();
+    }
+}