数组常见练习题

野性酷女 2021-11-29 12:10 317阅读 0赞

数组复制：

package com.java.base2.Practice;
    
    public class Test7 {
        public static void main(String[] args) {
            int[] array, array2;
            array = new int[]{2, 3, 5, 7, 11, 13, 17, 19};
            array2 = new int[array.length];
            for (int i = 0; i < array2.length; i++) {
                array2[i] = array[i];
            }
    
            System.out.println("比较地址值：");
            System.out.println(array);
            System.out.println(array2);
            System.out.println("内容打印：");
            for (int i = 0; i < array.length; i++) {
                System.out.print(array[i] + "\t");
            }
            System.out.print("\n");
            for (int i = 0; i < array2.length; i++) {
                System.out.print(array2[i] + "\t");
            }
        }
    }

字符串类型数组复制：

package com.java.base2.Practice;
    
    public class Test8 {
        public static void main(String[] args) {
            String[] array = new String[]{"gege", "didi", "jiejie", "meimei", "AA"};
            String[] array2 = new String[array.length];
    
            /**
             * 数组复制
             */
            for (int i = 0; i < array.length; i++) {
                array2[i] = array[i];
            }
    
            System.out.println("array2:");
            for (int i = 0; i < array2.length; i++) {
                System.out.printf(array2[i] + "\t");
            }
    
            /**
             * 更改array2的第二个数组
             */
            array2[2] = "tesila";
            System.out.println();
            for (int i = 0; i < array2.length; i++) {
                System.out.printf(array2[i] + "\t");
            }
    
    
            System.out.println();
            System.out.println("arr1的数值是：");
            for (int i = 0; i < array.length; i++) {
                System.out.print(array[i] + "\t");
            }
        }
    }

数组的翻转操作:

package com.java.base2.Practice;
    
    /**
     * 数组翻转
     */
    public class Test9 {
        public static void main(String[] args) {
            String[] array = new String[]{"AA", "BB", "CC", "DD", "EE"};
            String[] array2 = new String[array.length];
    
            /**
             * 数组翻转逻辑
             */
            for (int j = 0; j < array.length / 2; j++) {
                String tmp = array[j];
                array[j] = array[array.length - j - 1];
                array[array.length - j - 1] = tmp;
            }
    
            for (int i = 0; i < array.length; i++) {
                System.out.print(array[i] + "\t");
            }
        }
    }

方法二：

package com.java.base2.Practice;
    
    public class Test10 {
        public static void main(String[] args) {
            String[] array = new String[]{"gege", "didi", "jiejie", "meimei", "AA"};
    
            for (int i = 0, j = array.length - 1; i < j; i++, j--) {
                String tmp = array[i];
                array[i] = array[j];
                array[j] = tmp;
            }
    
            for (int i = 0; i < array.length; i++) {
                System.out.println(array[i]);
            }
        }
    }

线性查找数组：

package com.java.base2.Practice;
    
    public class Test11 {
        
        public static void main(String[] args) {
        
            String[] arr = {"AA", "BB", "CC", "DD", "EE"};
    
            String dss = "BB";
            boolean isFlag = true;
            for (int i = 0; i < arr.length; i++) {
        
                if (dss.equals(arr[i])) {
        
                    System.out.println("索引是：" + i);
                    isFlag = false;
                    break;
                }
            }
    
            if (isFlag) {
        
                System.out.println("抱歉，您的数组里面没有您想要的值");
            }
        }
    }

转载于:https://www.cnblogs.com/lizhen1412/p/11181424.html