• 方法一：

public static void main(String[] args) {

        int[] num1 = new int[]{1, 2, 4, 6, 7, 123, 411, 5334, 1414141, 1314141414};
        int[] num2 = new int[]{0, 2, 5, 7, 89, 113, 5623, 6353, 134134};
        //变量用于存储两个集合应该被比较的索引（存入新集合就加一）
        int a = 0;
        int b = 0;
        int[] num3 = new int[num1.length + num2.length];
        for (int i = 0; i < num3.length; i++) {
            if (a < num1.length && b < num2.length) {   //两数组都未遍历完，相互比较后加入
                if (num1[a] > num2[b]) {
                    num3[i] = num2[b];
                    b++;
                } else {
                    num3[i] = num1[a];
                    a++;
                }
            } else if (a < num1.length) {   //num2已经遍历完，无需比较，直接将剩余num1加入
                num3[i] = num1[a];
                a++;
            } else if (b < num2.length) {    //num1已经遍历完，无需比较，直接将剩余num2加入
                num3[i] = num2[b];
                b++;
            }
        }
        System.out.println( Arrays.toString(num3));

        
        }

• 方法二：

package com.suanfa.list;

import java.util.ArrayList;

public class shuzupaixu {
    public static int[] paixu(int[] a,int[] b) {
//把两个数组里的数据添加的集合里
        ArrayList<Integer> aList = new ArrayList<Integer>(a.length+b.length);
        for (int i = 0; i < a.length; i++) {
            aList.add(a[i]);    
        }
        for (int j = 0; j < b.length; j++) {
            aList.add(b[j]);        
        }
//把集合再转为数组
        int[] c = new int[aList.size()];
        for (int k = 0; k < c.length; k++) {
            c[k] = aList.get(k);            
        }       
//冒泡排序得出结果
        for (int i = 0; i < c.length; i++) {
            for (int j = 0; j < c.length-1-i; j++) {
                if (c[j]>c[j+1]) {
                    int tmp = c[j] ;
                    c[j] = c[j+1];
                    c[j+1] = tmp;                   
                }               
            }           
        }       
        return c;       
    }
    public static void main(String[] args) {
        int[] a = new int[]{1,20,3};
        int[] b = new int[]{4,10,6};
        for (int i = 0; i < paixu(a, b).length; i++) {
            System.out.print(paixu(a, b)[i]+" ");
            
        }
    }

}