List list=Arrays.asList(p);
        list.remove(3);

public class test{ 
    
    public static void main(String[] args) {

        String[][] p = {{"fh","nh"},{"mm","nh"},{"gg",""},{"jj",""},{"gh",""}};
        
        int count = 0;
        
        // 前移
        for (int i = 0; i < p.length; i++) {
            if (p[i][0] == "gg") {
                for (int j = i + 1; j < p.length; j++) {
                    p[j - 1][0] = p[j][0];
                    p[j - 1][1] = p[j][1];
                }
                count++;
            }
        }
        
        //后面的置空
        for(int i = p.length - 1;count > 0; count--) {
            p[i][0] = "";
            p[i][1] ="";
            i--;
        }
        for (int i = 0; i < p.length; i++) {
            for (int j = 0; j < p[i].length; j++) {
                System.out.print(p[i][j] + " ");
            }
            System.out.println();
        }
    }

}

public class DeleteMemInArray {
    public static void main (String args[]){
        String[][] p={{ "fh ", "nh "},{ "mm ", "nh"},{ "gg",""},{ "jj", ","},{ "gh", ","}};
        
        System.out.print("原数组元素有：");
        for (int i=0; i<p.length; i++)
            for (int j=0; j<p[i].length; j++)
                System.out.print(p[i][j] +" ");
        
        p[2] = null; //删除{ "gg",""}
        
        for (int i=2; i<p.length-1; i++)
            p[i] = p[i+1];//后续数组元素向前移动
        
        
        System.out.print("\n删除后的数组元素有：");
        
        for (int i=0; i<p.length-1; i++)
            for (int j=0; j<p[i].length; j++)
                System.out.print(p[i][j] +" ");
    }
}

原数组元素有：fh  nh  mm  nh gg  jj , gh , 
删除后的数组元素有：fh  nh  mm  nh jj , gh , 

public class test{ 
    
    public static void main(String[] args) {

        String[][] p = {{"fh","nh"},{"mm","nh"},{"gg",""},{"jj",""},{"gh",""}};
        
        int count = 0;
        
        // 前移
        for (int i = 0; i < p.length; i++) {
            if (p[i][0] == "gg") {
                for (int j = i + 1; j < p.length; j++) {
                    p[j - 1][0] = p[j][0];
                    p[j - 1][1] = p[j][1];
                }
                count++;
            }
        }
        
        String [][] pNew = new String[p.length - count][2];
        
        for (int i = 0; i < pNew.length; i++) {
            // 每一维使用arraycopy
            System.arraycopy(p[i], 0, pNew[i], 0, 2);
        }
              
        for (int i = 0; i < pNew.length; i++) {
            for (int j = 0; j < pNew[i].length; j++) {
                System.out.print(pNew[i][j] + " ");
            }
            System.out.println();
        }
    }

}

fh nh 
mm nh 
jj  
gh